# Polar bears can eat as many as 86 penguins in a single sitting.
# The first McDonald's restaurant opened for business in 1952 in Edinburgh, Scotland, and featured the McHaggis sandwich.
# The Air Force's F-117 fighter uses aerodynamics discovered during research into how bumblebees fly.
# You *can* get blood from a stone, but only if contains at least 17 percent bauxite.
# Silly Putty was "discovered" as the residue left behind after the first latex condoms were produced. It's not widely publicized for obvious reasons.
# Approximately one-sixth of your life is spent on Wednesdays.
# The skin needed for elbow transplants must be taken from the scrotum of a cadaver.
# The sport of jai alai originated from a game played by Incan priests who held cats by their tails and swung at leather balls. The cats would instinctively grab at the ball with their claws, thus enabling players to catch them.
# A cat's purr has the same romance-enhancing frequency as the voice of singer Barry White.
# The typewriter was invented by Hungarian immigrant Qwert Yuiop, who left his "signature" on the keyboard.
# The volume of water that the Giant Sequoia tree consumes in a 24-hour period contains enough suspended minerals to pave 17.3 feet of a 4-lane concrete freeway.
# King Henry VIII slept with a gigantic axe.
# Because printed materials are being replaced by CD-ROM, microfiche and the Internet, libraries that previously sank into their foundations under the weight of their books are now in danger of collapsing in extremely high winds.
# In 1843, a Parisian street mime got stuck in his imaginary box and consequently died of starvation.
# Touch-tone telephone keypads were originally planned to have buttons for Police and Fire Departments, but they were replaced with * and # when the project was cancelled in favor of developing the 911 system.
# Human saliva has a boiling point three times that of regular water.
# Calvin, of the "Calvin and Hobbes" comic strip, was patterned after President Calvin Coolidge, who had a pet tiger as a boy.
# Watching an hour-long soap opera burns more calories than watching a three-hour baseball game.
# Until 1978, Camel cigarettes contained minute particles of real camels.
# You can actually sharpen the blades on a pencil sharpener by wrapping your pencils in aluminum foil before inserting them.
# To human taste buds, Zima is virtually indistinguishable from zebra urine.
# Seven out of every ten hockey-playing Canadians will lose a tooth during a game. For Canadians who don't play hockey, that figure drops to five out of ten.
# A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
# A team of University of Virginia researchers released a study promoting the practice of picking one's nose, claiming that the health benefits of keeping nasal passages free from infectious blockages far outweigh the negative social connotations.
# Among items left behind at Osama bin Laden's headquarters in Afghanistan were 27 issues of Mad Magazine. Al Qaeda members have admitted that bin Laden is reportedly an avid reader.
# Urine from male cape water buffaloes is so flammable that some tribes use it for lantern fuel.
# At the first World Cup championship in Uruguay, 1930, the soccer balls were actually monkey skulls wrapped in paper and leather.
# Every Labrador retriever dreams about bananas.
# If you put a bee in a film canister for two hours, it will go blind and leave behind its weight in honey.
# Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
# Never hold your nose and cover your mouth when sneezing, as it can blow out your eyeballs.
# Centuries ago, purchasing real estate often required having one or more limbs amputated in order to prevent the purchaser from running away to avoid repayment of the loan. Hence an expensive purchase was said to cost "an arm and a leg."
# When Mahatma Gandhi died, an autopsy revealed five gold Krugerrands in his small intestine.
# Aardvarks are allergic to radishes, but only during summer months.
# Coca-Cola was the favored drink of Pharaoh Ramses. An inscription found in his tomb, when translated, was found to be almost identical to the recipe used today.
# If you part your hair on the right side, you were born to be carnivorous. If you part it on the left, your physical and psychological make-up is that of a vegetarian.
# When immersed in liquid, a dead sparrow will make a sound like a crying baby.
# In WWII the US military planned to airdrop over France propaganda in the form of Playboy magazine, with coded messages hidden in the models' turn-ons and turn-offs. The plan was scrapped because of a staple shortage due to rationing of metal.
# Although difficult, it's possible to start a fire by rapidly rubbing together two Cool Ranch Doritos.
# Napoleon's favorite type of wood was knotty chestnut.
# The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
# Due to the natural "momentum" of the ocean, saltwater fish cannot swim backwards.
# In ancient Greece, children of wealthy families were dipped in olive oil at birth to keep them hairless throughout their lives.
# It is nearly three miles farther to fly from Amarillo, Texas to Louisville, Kentucky than it is to return from Louisville to Amarillo.
# The "nine lives" attributed to cats is probably due to their having nine primary whiskers.
# The original inspiration for Barbie dolls comes from dolls developed by German propagandists in the late 1930s to impress young girls with the ideal notions of Aryan features. The proportions for Barbie were actually based on those of Eva Braun.
# The Venezuelan brown bat can detect and dodge individual raindrops in mid-flight, arriving safely back at his cave completely dry.
Genaral facts to know
Labels:
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general,
human facts,
information
# In the weightlessness of space a frozen pea will explode if it comes in contact with Pepsi.
# The increased electricity used by modern appliance parts is causing a shift in the Earth's magnetic field. By the year 2327, the North Pole will be located in mid-Kansas, while the South Pole will be just off the coast of East Africa.
# The idea for "tribbles" in "Star Trek" came from gerbils, since some gerbils are actually born pregnant.
# Male rhesus monkeys often hang from tree branches by their amazing prehensile penises.
# Johnny Plessey batted .331 for the Cleveland Spiders in 1891, even though he spent the entire season batting with a rolled-up, lacquered copy of the Toledo Post-Dispatch.
# Smearing a small amount of dog feces on an insect bite will relieve the itching and swelling.
# The Boeing 747 is capable of flying upside-down if it weren't for the fact that the wings would shear off when trying to roll it over.
# The trucking company Elvis Presley worked at as a young man was owned by Frank Sinatra.
# The only golf course on the island of Tonga has 15 holes, and there's no penalty if a monkey steals your golf ball.
# Legislation passed during WWI making it illegal to say "gesundheit" to a sneezer was never repealed.
# Manatees possess vocal chords which give them the ability to speak like humans, but don't do so because they have no ears with which to hear the sound.
# SCUBA divers cannot pass gas at depths of 33 feet or below.
# Catfish are the only animals that naturally have an ODD number of whiskers.
# Replying more than 100 times to the same piece of spam e-mail will overwhelm the sender's system and interfere with their ability to send any more spam.
# The increased electricity used by modern appliance parts is causing a shift in the Earth's magnetic field. By the year 2327, the North Pole will be located in mid-Kansas, while the South Pole will be just off the coast of East Africa.
# The idea for "tribbles" in "Star Trek" came from gerbils, since some gerbils are actually born pregnant.
# Male rhesus monkeys often hang from tree branches by their amazing prehensile penises.
# Johnny Plessey batted .331 for the Cleveland Spiders in 1891, even though he spent the entire season batting with a rolled-up, lacquered copy of the Toledo Post-Dispatch.
# Smearing a small amount of dog feces on an insect bite will relieve the itching and swelling.
# The Boeing 747 is capable of flying upside-down if it weren't for the fact that the wings would shear off when trying to roll it over.
# The trucking company Elvis Presley worked at as a young man was owned by Frank Sinatra.
# The only golf course on the island of Tonga has 15 holes, and there's no penalty if a monkey steals your golf ball.
# Legislation passed during WWI making it illegal to say "gesundheit" to a sneezer was never repealed.
# Manatees possess vocal chords which give them the ability to speak like humans, but don't do so because they have no ears with which to hear the sound.
# SCUBA divers cannot pass gas at depths of 33 feet or below.
# Catfish are the only animals that naturally have an ODD number of whiskers.
# Replying more than 100 times to the same piece of spam e-mail will overwhelm the sender's system and interfere with their ability to send any more spam.
Try to find out the wrong fact..!
Labels:
facts,
general,
information,
IQ teasers
The word "queue" is the only word in the English language that is still pronounced the same way when the last four letters are removed.
Beetles taste like apples, wasps like pine nuts, and worms like fried bacon.
Of all the words in the English language, the word 'set' has the most definitions!
What is called a "French kiss" in the English speaking world is known as an "English kiss" in France.
"Almost" is the longest word in the English language with all the letters in alphabetical order.
"Rhythm" is the longest English word without a vowel.
In 1386, a pig in France was executed by public hanging for the murder of a child
A cockroach can live several weeks with its head cut off!
Human thigh bones are stronger than concrete.
You can't kill yourself by holding your breath
There is a city called Rome on every continent.
It's against the law to have a pet dog in Iceland!
Your heart beats over 100,000 times a day!
Horatio Nelson, one of England's most illustrious admirals was throughout his life, never able to find a cure for his sea-sickness.
The skeleton of Jeremy Bentham is present at all important meetings of the University of London
Right handed people live, on average, nine years longer than left-handed people
Your ribs move about 5 million times a year, everytime you breathe!
The elephant is the only mammal that can't jump!
One quarter of the bones in your body, are in your feet!
Like fingerprints, everyone's tongue print is different!
The first known transfusion of blood was performed as early as 1667, when Jean-Baptiste, transfused two pints of blood from a sheep to a young man
Fingernails grow nearly 4 times faster than toenails!
Most dust particles in your house are made from dead skin!
The present population of 5 billion plus people of the world is predicted to become 15 billion by 2080.
Women blink nearly twice as much as men.
Adolf Hitler was a vegetarian, and had only ONE testicle.
Honey is the only food that does not spoil. Honey found in the tombs of Egyptian pharaohs has been tasted by archaeologists and found edible.
Months that begin on a Sunday will always have a "Friday the 13th."
Coca-Cola would be green if colouring weren’t added to it.
On average a hedgehog's heart beats 300 times a minute.
More people are killed each year from bees than from snakes.
The average lead pencil will draw a line 35 miles long or write approximately 50,000 English words.
More people are allergic to cow's milk than any other food.
Camels have three eyelids to protect themselves from blowing sand.
The placement of a donkey's eyes in its' heads enables it to see all four feet at all times!
The six official languages of the United Nations are: English, French, Arabic, Chinese, Russian and Spanish.
Earth is the only planet not named after a god.
It's against the law to burp, or sneeze in a church in Nebraska, USA.
You're born with 300 bones, but by the time you become an adult, you only have 206.
Some worms will eat themselves if they can't find any food!
Dolphins sleep with one eye open!
It is impossible to sneeze with your eyes open
The worlds oldest piece of chewing gum is 9000 years old!
The longest recorded flight of a chicken is 13 seconds
Queen Elizabeth I regarded herself as a paragon of cleanliness. She declared that she bathed once every three months, whether she needed it or not
Slugs have 4 noses.
Owls are the only birds who can see the colour blue.
A man named Charles Osborne had the hiccups for 69 years!
A giraffe can clean its ears with its 21-inch tongue!
The average person laughs 10 times a day!
An ostrich's eye is bigger than its brain
Beetles taste like apples, wasps like pine nuts, and worms like fried bacon.
Of all the words in the English language, the word 'set' has the most definitions!
What is called a "French kiss" in the English speaking world is known as an "English kiss" in France.
"Almost" is the longest word in the English language with all the letters in alphabetical order.
"Rhythm" is the longest English word without a vowel.
In 1386, a pig in France was executed by public hanging for the murder of a child
A cockroach can live several weeks with its head cut off!
Human thigh bones are stronger than concrete.
You can't kill yourself by holding your breath
There is a city called Rome on every continent.
It's against the law to have a pet dog in Iceland!
Your heart beats over 100,000 times a day!
Horatio Nelson, one of England's most illustrious admirals was throughout his life, never able to find a cure for his sea-sickness.
The skeleton of Jeremy Bentham is present at all important meetings of the University of London
Right handed people live, on average, nine years longer than left-handed people
Your ribs move about 5 million times a year, everytime you breathe!
The elephant is the only mammal that can't jump!
One quarter of the bones in your body, are in your feet!
Like fingerprints, everyone's tongue print is different!
The first known transfusion of blood was performed as early as 1667, when Jean-Baptiste, transfused two pints of blood from a sheep to a young man
Fingernails grow nearly 4 times faster than toenails!
Most dust particles in your house are made from dead skin!
The present population of 5 billion plus people of the world is predicted to become 15 billion by 2080.
Women blink nearly twice as much as men.
Adolf Hitler was a vegetarian, and had only ONE testicle.
Honey is the only food that does not spoil. Honey found in the tombs of Egyptian pharaohs has been tasted by archaeologists and found edible.
Months that begin on a Sunday will always have a "Friday the 13th."
Coca-Cola would be green if colouring weren’t added to it.
On average a hedgehog's heart beats 300 times a minute.
More people are killed each year from bees than from snakes.
The average lead pencil will draw a line 35 miles long or write approximately 50,000 English words.
More people are allergic to cow's milk than any other food.
Camels have three eyelids to protect themselves from blowing sand.
The placement of a donkey's eyes in its' heads enables it to see all four feet at all times!
The six official languages of the United Nations are: English, French, Arabic, Chinese, Russian and Spanish.
Earth is the only planet not named after a god.
It's against the law to burp, or sneeze in a church in Nebraska, USA.
You're born with 300 bones, but by the time you become an adult, you only have 206.
Some worms will eat themselves if they can't find any food!
Dolphins sleep with one eye open!
It is impossible to sneeze with your eyes open
The worlds oldest piece of chewing gum is 9000 years old!
The longest recorded flight of a chicken is 13 seconds
Queen Elizabeth I regarded herself as a paragon of cleanliness. She declared that she bathed once every three months, whether she needed it or not
Slugs have 4 noses.
Owls are the only birds who can see the colour blue.
A man named Charles Osborne had the hiccups for 69 years!
A giraffe can clean its ears with its 21-inch tongue!
The average person laughs 10 times a day!
An ostrich's eye is bigger than its brain
One of these facts is wrong...!
try to trace it.
try to trace it.
Women can smell better than men..!
Labels:
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fun,
human facts,
information
A woman friend of mine recently commented about her guy: “He’s such a boy. His towels are stinky. And he doesn’t seem to notice!” Well, maybe he can’t smell the stinkyness. According to recent research from the Monell Chemical Senses Center, women have much sharper noses.
Scientists collected microdroplets of perspiration, and had men and women sniff the vials. According to both, the odors were equally rich. Subjects were then asked to rate odor strength when sniffing the sweat mixed one by one with 32 different fragrances. Only two of the fragrances stopped women from smelling the sweat. But 19 fragrances successfully blocked it from male noses.
Body odor is special—the authors note that in previous studies men’s and women’s scent detection did not differ when it came to other aromas. The researchers also concluded that men’s odor is harder to mask than women’s, regardless of who sniffs. Only a fifth of the fragrances could cover up male odor. But half of the scents masked female odor. The researchers suggest that for women there may be important biological information contained in male sweat. So maybe don’t wash those towels just yet.
—Christie Nicholson
ref: http://www.sciam.com/podcast/episode.cfm?id=women-smell-better-than-men-09-04-09
Scientists collected microdroplets of perspiration, and had men and women sniff the vials. According to both, the odors were equally rich. Subjects were then asked to rate odor strength when sniffing the sweat mixed one by one with 32 different fragrances. Only two of the fragrances stopped women from smelling the sweat. But 19 fragrances successfully blocked it from male noses.
Body odor is special—the authors note that in previous studies men’s and women’s scent detection did not differ when it came to other aromas. The researchers also concluded that men’s odor is harder to mask than women’s, regardless of who sniffs. Only a fifth of the fragrances could cover up male odor. But half of the scents masked female odor. The researchers suggest that for women there may be important biological information contained in male sweat. So maybe don’t wash those towels just yet.
—Christie Nicholson
ref: http://www.sciam.com/podcast/episode.cfm?id=women-smell-better-than-men-09-04-09
Labels:
IQ teasers,
maths,
mystery,
placement questions,
puzzle
Three people check into a hotel. They pay £30 to the manager and go to their room. The manager suddenly remembers that the room rate is £25 and gives £5 to the bellboy to return to the people. On the way to the room the bellboy reasons that £5 would be difficult to share among three people so he pockets £2 and gives £1 to each person. Now each person paid £10 and got back £1. So they paid £9 each, totaling £27. The bellboy has £2, totaling £29. Where is the missing £1?
Ans:
We have to be careful what we are adding together. Originally, they paid £30, they each received back £1, thus they now have only paid £27. Of this £27, £25 went to the manager for the room and £2 went to the bellboy.
Ans:
We have to be careful what we are adding together. Originally, they paid £30, they each received back £1, thus they now have only paid £27. Of this £27, £25 went to the manager for the room and £2 went to the bellboy.
Try it for three weightings
Labels:
IQ teasers,
maths,
placement questions,
puzzle
You have 12 coins, one of which is fake. The fake coin is indistinguishable from the rest except that it is either heavier or lighter, but you don't know which. Can you determine which is the fake coin and whether it is lighter or heavier using a balance scale and only 3 weightings?
Ans:
One solution is to label the coins with the letters FAKE MIND CLOT and weigh the coins in the following three combination:
Ans:
One solution is to label the coins with the letters FAKE MIND CLOT and weigh the coins in the following three combination:
MA DO -- LIKE
ME TO -- FIND
FAKE -- COIN
Logic will now allow you to find the fake coin based on the three results. For instance, if the results were left down, balanced, left down, we could work out which coin is fake in the following way:
From the middle weighing we know that the coins METOFIND are all normal. So one of the coins ACKL is fake. Therefore looking at these coins one at a time in the other two weighings, we can see that:
A - appears on the left twice and could be fake.
C - appears only once, therefore can't be fake (otherwise the first weighing would be balanced).
K - appears on opposite sides, so it can't make the left side go down both times.
L - appears only once, therefore can't be fake (otherwise the third weighing would be balanced).
Therefore the only possibility is A, which must be heavier. Any other combination of ups and downs will allow you to use the same logic to find the fake coin.
Labels:
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think to answer
Matthew Shelborn frequently has to travel for his company, which gives him a chance to meet many people from all parts of the USA. In April, Matthew flew to five different US cities on business and he flew a different airline each time. During each trip he chatted with the person next to him, and no two people he talked to were in the same profession.
From the information, can you determine the date Matthew made each flight (each was on a Monday exactly one week apart starting on April 2nd), the airline he flew, his destination, and the profession of the person who sat next to him on each flight?
1. Three consecutive flights were, in order from first to last, the flight Matthew took with WTA Airways, the flight where he sat next to the teacher, and the flight he took to Atlanta.
2. Matthew sat beside the sports coach on a flight some time earlier in the month than the one he took to Seattle.
3. The week he flew Air Express was some time earlier in the month than the trip to Boston, which was some time earlier in the month than the trip where he sat next to the ballet dancer.
4. It wasn't on the trip to San Diego where Matthew sat next to the doctor.
5. Matthew didn't fly Skyways on his trip to Seattle, and he didn't fly WTA Airways on the trip where he sat next to the sports coach.
6. Atlanta was not Matthew's destination on the trip where he made the acquaintance of the ballet dancer.
7. The Fly America flight was exactly two weeks before the flight where Matthew passed the time chatting with the attorney.
Dates: April 2nd, April 9th, April 16th, April 23rd, April 30th
Airline: Air Express, Fly America, MidUSA Air, Skyways, WTA Airways
Destination: Atlanta, Boston, Chicago, San Diego, Seattle
Seat Mate: Attorney, Ballet Dancer, Doctor, Sports Coach, Teacher
Ans:
Date Airline Destination Seat Mate
April 2nd WTA Airways Chicago Doctor
April 9th Fly America San Diego Teacher
April 16th Air Express Atlanta Sports Coach
April 23rd Skyways Boston Attorney
April 30th MidUSA Air Seattle Ballet Dancer
The trip to Atlanta (1), the trip where Matthew sat next to the ballet dancer (3), and the trip where Matthew sat next to the attorney (7) were among the last three trips [April 16th, 23rd, and 30th (intro)], and the trip to Atlanta wasn't the one where he met the ballet dancer (6) or the attorney [he flew WTA Airways exactly two weeks before the one to Atlanta, and he flew Fly America exactly two weeks before he sat by the attorney (7), thus, these three are separate flights, in some order. He didn't sit by the teacher on the trip to Atlanta (1), so the flight were he sat by the teacher was on one of the first two flights [April 2nd and April 9th (intro)], but it wasn't first [after WTA Airways](1), therefore, April 2nd flight was the WTA Airways flight, the one where he sat by the teacher was the April 9th flight, and the one to Atlanta was the April 16th flight, and he sat by the ballet dancer and attorney on the April 23rd and
April 30th flight, in some order. He didn't sit beside the sports coach on the WTA Airways flight (5) so that wasn't April 2nd, he sat beside the sports coach on the Atlanta flight [April 16th] and it was the April 2nd flight where he sat next to the doctor. April 2nd [first flight, WTA Airways, doctor] wasn't to Seattle (2), Boston (3), or San Diego (4), that flight was to Chicago. The April 9th flight wasn't to Seattle [after sports coach which was April 16th] or to Boston [after Air Express, which would have to be April 2nd, but WTA Airways was April 2nd (1)](3), thus, on April 9th he flew to San Diego. Boston wasn't the last destination (3), so it was his destination on April 23rd and Seattle was his destination on April 30th. Boston [April 23rd] was before the one where he sat by the ballet dancer (3), so he sat by the ballet dancer on April 30th flight to Seattle, and it was on the April 23rd flight to Boston that he sat by the attorney. Since he sat by the attorney on the April 23rd flight, then he flew Fly America on the 9th [exactly two weeks before](7). He flew Air Express before the flight when he flew to Boston [April 23rd](3) so he flew Air Express on the 16th. He didn't fly Skyways to Seattle [April 30th](5), thus, he flew Skyways to Boston on the 23rd and his last flight that month was on MidUSA Air (intro).
Try to trace the no of eggs
Labels:
IQ teasers,
maths,
mystery,
puzzle,
workout
Once upon a time, and old lady went to sell her vast quantity of eggs at the local market.
When asked how many she had, she replied:
Son, I can't count past 100 but I know that.
If you divide the number of eggs by 2 there will be one egg left.
If you divide the number of eggs by 3 there will be one egg left.
If you divide the number of eggs by 4 there will be one egg left.
If you divide the number of eggs by 5 there will be one egg left.
If you divide the number of eggs by 6 there will be one egg left.
If you divide the number of eggs by 7 there will be one egg left.
If you divide the number of eggs by 8 there will be one egg left.
If you divide the number of eggs by 9 there will be one egg left.
If you divide the number of eggs by 10 there will be one egg left.
Finally. If you divide the Number of eggs by 11 there will be NO EGGS left!
How many eggs did the old lady have?
25,201 eggs. This puzzle has a few different methods for finding the solution, one of which is:
Find a number X into which all of the numbers from 2 to 10 divide evenly. You can do this by simply using 2*3*4*5*6*7*8*9*10, but you can find a smaller number by finding the prime factors, a subset of which can be used to form any number from 2 to 10. 2*2*2*3*3*5*7 will do. This comes out to be 2520, and is the lowest number into which all the numbers 2-10 divide evenly.
We can add 1 to this number to satisfy the first 9 constraints of the puzzle (the remainder of 2521/2, 2521/3 ... 2521/10 is one), but this does not satisfy the last constraint, divisibility by 11.
Fortunately, we can multiply X (=2520) by any integer and add 1 and we will still satisfy constraints 1-9. So what Y do we multiply X by so that (X*Y) + 1 is divisible by 11. 2520/11 has a remainder of 1. Thus two 2520s divided by eleven would have a remainder of 1+1 = 2, and so forth...so ten 2520s divided by 11 would have a remainder of 10. This number plus one would divide eleven evenly, as well as also satisfy the first 9 constraints - thus 25201 is the answer.
When asked how many she had, she replied:
Son, I can't count past 100 but I know that.
If you divide the number of eggs by 2 there will be one egg left.
If you divide the number of eggs by 3 there will be one egg left.
If you divide the number of eggs by 4 there will be one egg left.
If you divide the number of eggs by 5 there will be one egg left.
If you divide the number of eggs by 6 there will be one egg left.
If you divide the number of eggs by 7 there will be one egg left.
If you divide the number of eggs by 8 there will be one egg left.
If you divide the number of eggs by 9 there will be one egg left.
If you divide the number of eggs by 10 there will be one egg left.
Finally. If you divide the Number of eggs by 11 there will be NO EGGS left!
How many eggs did the old lady have?
25,201 eggs. This puzzle has a few different methods for finding the solution, one of which is:
Find a number X into which all of the numbers from 2 to 10 divide evenly. You can do this by simply using 2*3*4*5*6*7*8*9*10, but you can find a smaller number by finding the prime factors, a subset of which can be used to form any number from 2 to 10. 2*2*2*3*3*5*7 will do. This comes out to be 2520, and is the lowest number into which all the numbers 2-10 divide evenly.
We can add 1 to this number to satisfy the first 9 constraints of the puzzle (the remainder of 2521/2, 2521/3 ... 2521/10 is one), but this does not satisfy the last constraint, divisibility by 11.
Fortunately, we can multiply X (=2520) by any integer and add 1 and we will still satisfy constraints 1-9. So what Y do we multiply X by so that (X*Y) + 1 is divisible by 11. 2520/11 has a remainder of 1. Thus two 2520s divided by eleven would have a remainder of 1+1 = 2, and so forth...so ten 2520s divided by 11 would have a remainder of 10. This number plus one would divide eleven evenly, as well as also satisfy the first 9 constraints - thus 25201 is the answer.
minimum possible steps: Switching & entering
Labels:
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There are 2 separated rooms, one having 8 bulbs and the other having 8 switches.
You have to find out which switch is of which bulb, in minimum possible steps.
Switching & entering into the room once is defined as ONE STEP
Ans
Since we have 8 bulbs and 8 switches, we only need to find out 7 bulb/switch pairs and then we should know the 8th pair.
With the remaining 7 switches, I choose to switch on two at a time (switching everything else off before each step), like this:
1&2
2&3
And then we should be able to pair switches 1, 2 and 3 to their respectful bulbs with bulb no. 2 being the one lit in both steps and bulbs no. 1 and 3 lit in their respectful steps, and then continue with the same method:
4&5
5&6
Having figured out switches 4,5 and 6 also, we only need to flick switch number 7 to see which one that links to. And as stated previously we should also know by then that bulb no. 8 is the one that was never turned on.
Anybody that can do it in fewer steps?
I'm at work right know, which I should really be getting back to but looking forward to working on a formula for this problem later I'm thinking something - 1, then modulus 3 and then the rest dived by three?
WAIT! - Strike everything above
Having written this post I wondered if turning on three bulbs at a time would work better.... and yeah.... I'm guessing we could do it in 4 steps... :P
Turning on:
Step 1: 1 & 2 & 3
Step 2: 3 & 4 & 5 Giving us the bulb linked to no. 3 (lit first two steps)
Step 3: 5 & 6 & 7 Giving us bulb no. 5 (lit in step 2&3) AND bulb no. 4 (only lit in step 2)
Step 4: 7 & 8 & 1 Same as above, giving no. 6 (only lit in step 3), no. 7 (lit in steps 3&4), no. 8 (the only one first lit in step 4) and bulb 1 (lit in steps 1 and 4)
I could have just turned on switch 7&1 with switch 8 then being linked to the one bulb never lit. Better yet, the same algorithm could be used to link 9 switch/bulb pairs, then with the 9th bulb never being lit.
I then decided to write out the steps in respect to number of odds and even numbers, as so:
1 - odd number 1 = O1
2 - even number 1 = E1
3 - odd number 2 = O2
4 - even number 2 = E2...
With this notation, the steps for the above problem (with 8 or 9 bulbs that is) would be:
O1 & E1 & O2
O2 & E2 & O3
O3 & E3 & O4
O4 & E4 & O1
As some might notice, the number of steps required to pair X switches/bulbs is the same as the number of even numbers counting up to (and including) X. And because an even number divided by two gives us the number of even numbers counting up to that number, all we need to do is to subtract one from the number if X is an odd number, and I would guess the best mathematical notation for that would by x - modulus(x/2), right?
So the the number of steps required to pair X switches to X bulbs is (x - modulus(x/2)) / 2
So, for example, to figure out 13 switch/bulb pairs, we would need:
(13 - modulus(13/2)) / 2
(13 - 1) / 2
12 / 2 = 6 steps
You have to find out which switch is of which bulb, in minimum possible steps.
Switching & entering into the room once is defined as ONE STEP
Ans
Since we have 8 bulbs and 8 switches, we only need to find out 7 bulb/switch pairs and then we should know the 8th pair.
With the remaining 7 switches, I choose to switch on two at a time (switching everything else off before each step), like this:
1&2
2&3
And then we should be able to pair switches 1, 2 and 3 to their respectful bulbs with bulb no. 2 being the one lit in both steps and bulbs no. 1 and 3 lit in their respectful steps, and then continue with the same method:
4&5
5&6
Having figured out switches 4,5 and 6 also, we only need to flick switch number 7 to see which one that links to. And as stated previously we should also know by then that bulb no. 8 is the one that was never turned on.
Anybody that can do it in fewer steps?
I'm at work right know, which I should really be getting back to
but looking forward to working on a formula for this problem later I'm thinking something - 1, then modulus 3 and then the rest dived by three?WAIT! - Strike everything above
Having written this post I wondered if turning on three bulbs at a time would work better.... and yeah.... I'm guessing we could do it in 4 steps... :P
Turning on:
Step 1: 1 & 2 & 3
Step 2: 3 & 4 & 5 Giving us the bulb linked to no. 3 (lit first two steps)
Step 3: 5 & 6 & 7 Giving us bulb no. 5 (lit in step 2&3) AND bulb no. 4 (only lit in step 2)
Step 4: 7 & 8 & 1 Same as above, giving no. 6 (only lit in step 3), no. 7 (lit in steps 3&4), no. 8 (the only one first lit in step 4) and bulb 1 (lit in steps 1 and 4)
I could have just turned on switch 7&1 with switch 8 then being linked to the one bulb never lit. Better yet, the same algorithm could be used to link 9 switch/bulb pairs, then with the 9th bulb never being lit.
I then decided to write out the steps in respect to number of odds and even numbers, as so:
1 - odd number 1 = O1
2 - even number 1 = E1
3 - odd number 2 = O2
4 - even number 2 = E2...
With this notation, the steps for the above problem (with 8 or 9 bulbs that is) would be:
O1 & E1 & O2
O2 & E2 & O3
O3 & E3 & O4
O4 & E4 & O1
As some might notice, the number of steps required to pair X switches/bulbs is the same as the number of even numbers counting up to (and including) X. And because an even number divided by two gives us the number of even numbers counting up to that number, all we need to do is to subtract one from the number if X is an odd number, and I would guess the best mathematical notation for that would by x - modulus(x/2), right?
So the the number of steps required to pair X switches to X bulbs is (x - modulus(x/2)) / 2
So, for example, to figure out 13 switch/bulb pairs, we would need:
(13 - modulus(13/2)) / 2
(13 - 1) / 2
12 / 2 = 6 steps
Happy news or sad ? :sunspots
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Are Scientists of NASA blaming the sun for drop in the sunspots?
Scientists had reported last year that they observed no sunspots on 266 days (73%) of 366 saying that the solar cycle had hit the bottom in 2008.
But this is not the case as the same scientists have observed an unusually quiet time for the Sun with the sunspot counts for 2009 having dropped even lower. As on March 31, there were no sunspots on 78 of the year's 90 days (87%), NASA
said.
"We are experiencing a very deep solar minimum," said solar physicist Dean Pensell of the Goddard space Flight Centre of NASA.
Every 11 years or so, the sunspots (a region on the Sun's surface marked by intense magnetic activity) on the surface of the Sun die out during solar cycle minimum.
Meanwhile, Prof Mayank Vahia, senior astrophysicist of the Tata Institute of Fundamental Research
(TIFR) said that this is a golden opportunity for the scientists to study Sun in such a quiet phase.
The silent Sun may not have serious consequences on earthlings, he said.
Scientists had reported last year that they observed no sunspots on 266 days (73%) of 366 saying that the solar cycle had hit the bottom in 2008.
But this is not the case as the same scientists have observed an unusually quiet time for the Sun with the sunspot counts for 2009 having dropped even lower. As on March 31, there were no sunspots on 78 of the year's 90 days (87%), NASA
said.
"We are experiencing a very deep solar minimum," said solar physicist Dean Pensell of the Goddard space Flight Centre of NASA.
Every 11 years or so, the sunspots (a region on the Sun's surface marked by intense magnetic activity) on the surface of the Sun die out during solar cycle minimum.
Meanwhile, Prof Mayank Vahia, senior astrophysicist of the Tata Institute of Fundamental Research
(TIFR) said that this is a golden opportunity for the scientists to study Sun in such a quiet phase.
The silent Sun may not have serious consequences on earthlings, he said.
23 Brilliant Doubts - Unanswered
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23 Brilliant Doubts - Unanswered
1.If all the nations in the world are in debt(am not joking. even US has got debts), where did all the money go? (weird)
2.When dog food is new and improved tasting, who tests it? (to be give a thought)
3.What is the speed of darkness? (absurd)
4.If the "black box" flight recorder is never damaged during a plane crash, why isn't the whole airplane made out of that stuff? (very good thinking)
5.Who copyrighted the copyright symbol? (who knows)
6.Can you cry under water? (let me try)
7.Why do people say, "you've been working like a dog" when dogs just sit around all day? (i think they meant something else)
8.Why are the numbers on a calculator and a phone reversed? (God knows)
9.Do fish ever get thirsty? (let me ask and tell)
10.Can you get cornered in a round room? (by ones eyes)
12.Why do birds not fall out of trees when they sleep? (tonight i will stay and watch)
13.What came first, the fruit or the color orange? (seed)
14.If corn oil is made from corn, and vegetable oil is made from vegetables, then what is baby oil made from? (No comments)
15.What should one call a male ladybird? (No comments)
16.If a person suffered from amnesia and then was cured would they remember that they forgot? (can somebody help )
17.Can you blow a balloon up under water? (yes u can)
18.Why is it called a "building" when it is already built? (strange isn't it)
19.If you were traveling at the speed of sound and you turned on your radio would you be ! able to hear it? (got to think scientifically)
20.If you're traveling at the speed of light and you turn your headlights on, what happens? (i don have a change to try)
21.Why is it called a TV set when theres only one? (very nice)
22.If a person owns a piece of land do they own it all the way down to the core of the earth? (this is nice)
23.Why do most cars have speedometers that go up to at least 130 when you legally can't go that fast on any road? (stupid, break the law)
1.If all the nations in the world are in debt(am not joking. even US has got debts), where did all the money go? (weird)
2.When dog food is new and improved tasting, who tests it? (to be give a thought)
3.What is the speed of darkness? (absurd)
4.If the "black box" flight recorder is never damaged during a plane crash, why isn't the whole airplane made out of that stuff? (very good thinking)
5.Who copyrighted the copyright symbol? (who knows)
6.Can you cry under water? (let me try)
7.Why do people say, "you've been working like a dog" when dogs just sit around all day? (i think they meant something else)
8.Why are the numbers on a calculator and a phone reversed? (God knows)
9.Do fish ever get thirsty? (let me ask and tell)
10.Can you get cornered in a round room? (by ones eyes)
12.Why do birds not fall out of trees when they sleep? (tonight i will stay and watch)
13.What came first, the fruit or the color orange? (seed)
14.If corn oil is made from corn, and vegetable oil is made from vegetables, then what is baby oil made from? (No comments)
15.What should one call a male ladybird? (No comments)
16.If a person suffered from amnesia and then was cured would they remember that they forgot? (can somebody help )
17.Can you blow a balloon up under water? (yes u can)
18.Why is it called a "building" when it is already built? (strange isn't it)
19.If you were traveling at the speed of sound and you turned on your radio would you be ! able to hear it? (got to think scientifically)
20.If you're traveling at the speed of light and you turn your headlights on, what happens? (i don have a change to try)
21.Why is it called a TV set when theres only one? (very nice)
22.If a person owns a piece of land do they own it all the way down to the core of the earth? (this is nice)
23.Why do most cars have speedometers that go up to at least 130 when you legally can't go that fast on any road? (stupid, break the law)
If Computer Continuously Restarts
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computer science,
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xp facts
The Computer Continuously Restarts
When you start your computer, the Microsoft Windows XP start up screen appears, and then the computer restarts. The Windows XP logon screen does not appear. This error can occur if the Kernel32.dll file is missing or damaged.
To resolve this issue, use the Windows Recovery Console to extract a new copy of the Kernel32.dll file from the original Windows XP compact disc (CD). To do this, follow these steps:
1. Start the Recovery Console. If you do not have the Recovery Console installed, start it from the Windows XP compact disc (CD). To do this, follow these steps:
a. Insert the Windows XP CD and restart the computer. If prompted, select any options required to boot from the CD.
b. When the text-based part of Setup begins, follow the prompts; choose the repair or recover option by pressing R.
c. If you have a dual-boot or multiple-boot system, choose the installation that you need to access from the recovery console.
d. When prompted, type the Administrator password.
2. At the command prompt, type "cd system32" (without the quotation marks), and then press ENTER.
3. Type "ren kernel32.dll kernel32.old" (without the quotation marks), and then press ENTER.
4. Type "map" (without the quotation marks), and then press ENTER.
5. Note the drive letter assigned to the CD-ROM drive that contains the Windows XP CD. It is displayed in a format similar to the following: D: \Device\CdRom0
6. Type "expand\i386\kernel32.dl_" (without the quotation marks) (where is the drive letter of the CD-ROM drive that contains the Windows XP CD), and then press ENTER. For example:
Expand d:\i386\kernel32.dl_
Note the underscore character after the "L" in Kernel32.dl_
The following message appears: Kernel32.dll, 1 file(s) expanded.
7. Type "exit" (without the quotation marks). The computer restarts.
8. Remove the Windows XP CD and start the computer normally.
When you start your computer, the Microsoft Windows XP start up screen appears, and then the computer restarts. The Windows XP logon screen does not appear. This error can occur if the Kernel32.dll file is missing or damaged.
To resolve this issue, use the Windows Recovery Console to extract a new copy of the Kernel32.dll file from the original Windows XP compact disc (CD). To do this, follow these steps:
1. Start the Recovery Console. If you do not have the Recovery Console installed, start it from the Windows XP compact disc (CD). To do this, follow these steps:
a. Insert the Windows XP CD and restart the computer. If prompted, select any options required to boot from the CD.
b. When the text-based part of Setup begins, follow the prompts; choose the repair or recover option by pressing R.
c. If you have a dual-boot or multiple-boot system, choose the installation that you need to access from the recovery console.
d. When prompted, type the Administrator password.
2. At the command prompt, type "cd system32" (without the quotation marks), and then press ENTER.
3. Type "ren kernel32.dll kernel32.old" (without the quotation marks), and then press ENTER.
4. Type "map" (without the quotation marks), and then press ENTER.
5. Note the drive letter assigned to the CD-ROM drive that contains the Windows XP CD. It is displayed in a format similar to the following: D: \Device\CdRom0
6. Type "expand
Expand d:\i386\kernel32.dl_
Note the underscore character after the "L" in Kernel32.dl_
The following message appears: Kernel32.dll, 1 file(s) expanded.
7. Type "exit" (without the quotation marks). The computer restarts.
8. Remove the Windows XP CD and start the computer normally.
Create a Control Panel menu directly below the Start Button
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Create a Control Panel menu directly below the Start Button
- Click the Start Button once with your right mouse button. You should see a right-button menu (called a context menu because it offers different choices in different contexts).
- You should see the items Open, Explore, and Find on the context menu. Click Explore with your left mouse button.
- An Explorer file management window should open. A directory tree should appear in the left pane, with the right pane displaying the contents of the Start Menu folder.
- Right-click any empty space within the right pane. A context menu should appear. Click New and then Folder.
- The Explorer will create a highlighted icon called New Folder. Type in the following string, all on one line, replacing the words New Folder with this new line. You must type the period, the curly braces, all four hyphens, and the hexadecimal numbers exactly as shown. After the closing curly brace, press Enter.
Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}
Other Folders can be added following the same instructions.
- Dial-Up Networking.{992CFFA0-F557-101A-88EC-00DD010CCC48}
- Printers.{2227A280-3AEA-1069-A2DE-08002B30309D}
- Inbox.{208D2C60-3AEA-1069-A2D7-08002B30309D}
- My Computer.{20D04FE0-3AEA-1069-A2D8-08002B30309D}
- Recycle Bin.{645FF040-5081-101B-9F08-00AA002F954E}
- Network Neighborhood.{208D2C60-3AEA-1069-A2D7-08002B30309D}
- Desktop.{00021400-0000-0000-C000-000000000046}
- Briefcase.{85BBD920-42A0-1069-A2E4-08002B30309D}
- Fonts.{BD84B380-8CA2-1069-AB1D-08000948F534}
Fixing Corrupted Desktop Icons
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Fixing Corrupted Desktop Icons
Easier way to reset icons then deleting SHELLICONCACHE.
There's no need to exit Win95 and delete the SHELLICONCACHE file in order to reset icons that you may have changed (like Network Neighborhood).
- Go to Control Panel, Display, Appearance Tab.
- Select Icon from the Item drop down list.
- Change the Size up or down one and apply.
- Change the Size back to your original and apply.
If your Start Menu is slow or your icons are black for some reason, it means your Shelliconcache file is corrupt and should be deleted.
Delete the hidden file.
It will be recreated the next time you start Win95
How to RemovePrograms from the Control Panel
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Removing Programs from the Control Panel
Easier way to remove control panel programs.
- Edit your control.ini file in your Windows directory.
- Under the section [don't load] add the appropriate .cpl file.
- For example to get rid of Network add netcpl.cpl=no
- This will disable users from accessing the network control panel.
- You can remove seected icons in your Control Panel by simply moving, deleting or renaming the *.cpl file in your C:\WINDOWS\SYSETM directory.
- The icon or file will still work even if it is not on the control panel screen.
How to creat a boot menu?
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Creating a Boot Menu
- Go to the DOS prompt.
- Type: ATTRIB MSDOS.SYS -r -a -h -s
- Edit MSDOS.SYS, adding the following lines under [Options]
- BootGUI=1 (If you have it set to 0)
- BootMenu=1
- BootMenuDefault=5 (1=GUI 5or6=DOS Prompt)
- BootMulti=1 (Allows you to boot to your old Operating System)
- BootMenuDelay=2 (# of seconds before default is chosen)
- Type Alt-F then S to save your file.
- Close the editor
- Type: ATTRIB MSDOS.SYS +r +a +h +s
- Reboot.
Note: BootGUI needs to be set to 1
if you have the menu running, otherwise even if you select 1 (Normal), it will not go to the GUI.
P.S. Supposedly Drvspace=0 nd Dblspace=0 under the Options section saves on RAM, but I haven't been able to confirm this.
20 things you didn't know about Windows XP
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20 things you didn't know about Windows XP
You've read the reviews and digested the key feature enhancements and operational changes. Now it's time to delve a bit deeper and uncover some of Windows XP's secrets.
1. It boasts how long it can stay up. Whereas previous versions of Windows were coy about how long they went between boots, XP is positively proud of its stamina. Go to the Command Prompt in the Accessories menu from the All Programs start button option, and then type 'systeminfo'. The computer will produce a lot of useful info, including the uptime. If you want to keep these, type 'systeminfo > info.txt'. This creates a file called info.txt you can look at later with Notepad. (Professional Edition only).
2. You can delete files immediately, without having them move to the Recycle Bin first. Go to the Start menu, select Run... and type 'gpedit.msc'; then select User Configuration, Administrative Templates, Windows Components, Windows Explorer and find the Do not move deleted files to the Recycle Bin setting. Set it. Poking around in gpedit will reveal a great many interface and system options, but take care -- some may stop your computer behaving as you wish. (Professional Edition only).
3. You can lock your XP workstation with two clicks of the mouse. Create a new shortcut on your desktop using a right mouse click, and enter 'rundll32.exe user32.dll,LockWorkStation' in the location field. Give the shortcut a name you like. That's it -- just double click on it and your computer will be locked. And if that's not easy enough, Windows key + L will do the same.
4. XP hides some system software you might want to remove, such as Windows Messenger, but you can tickle it and make it disgorge everything. Using Notepad or Edit, edit the text file /windows/inf/sysoc.inf, search for the word 'hide' and remove it. You can then go to the Add or Remove Programs in the Control Panel, select Add/Remove Windows Components and there will be your prey, exposed and vulnerable.
5. For those skilled in the art of DOS batch files, XP has a number of interesting new commands. These include 'eventcreate' and 'eventtriggers' for creating and watching system events, 'typeperf' for monitoring performance of various subsystems, and 'schtasks' for handling scheduled tasks. As usual, typing the command name followed by /? will give a list of options -- they're all far too baroque to go into here.
6. XP has IP version 6 support -- the next generation of IP. Unfortunately this is more than your ISP has, so you can only experiment with this on your LAN. Type 'ipv6 install' into Run... (it's OK, it won't ruin your existing network setup) and then 'ipv6 /?' at the command line to find out more. If you don't know what IPv6 is, don't worry and don't bother.
7. You can at last get rid of tasks on the computer from the command line by using 'taskkill /pid' and the task number, or just 'tskill' and the process number. Find that out by typing 'tasklist', which will also tell you a lot about what's going on in your system.
8. XP will treat Zip files like folders, which is nice if you've got a fast machine. On slower machines, you can make XP leave zip files well alone by typing 'regsvr32 /u zipfldr.dll' at the command line. If you change your mind later, you can put things back as they were by typing 'regsvr32 zipfldr.dll'.
9. XP has ClearType -- Microsoft's anti-aliasing font display technology -- but doesn't have it enabled by default. It's well worth trying, especially if you were there for DOS and all those years of staring at a screen have given you the eyes of an astigmatic bat. To enable ClearType, right click on the desktop, select Properties, Appearance, Effects, select ClearType from the second drop-down menu and enable the selection. Expect best results on laptop displays. If you want to use ClearType on the Welcome login screen as well, set the registry entry HKEY_USERS/.DEFAULT/Control Panel/Desktop/FontSmoothingType to 2.
10. You can use Remote Assistance to help a friend who's using network address translation (NAT) on a home network, but not automatically. Get your pal to email you a Remote Assistance invitation and edit the file. Under the RCTICKET attribute will be a NAT IP address, like 192.168.1.10. Replace this with your chum's real IP address -- they can find this out by going to www.whatismyip.com -- and get them to make sure that they've got port 3389 open on their firewall and forwarded to the errant computer.
11. You can run a program as a different user without logging out and back in again. Right click the icon, select Run As... and enter the user name and password you want to use. This only applies for that run. The trick is particularly useful if you need to have administrative permissions to install a program, which many require. Note that you can have some fun by running programs multiple times on the same system as different users, but this can have unforeseen effects.
12. Windows XP can be very insistent about you checking for auto updates, registering a Passport, using Windows Messenger and so on. After a while, the nagging goes away, but if you feel you might slip the bonds of sanity before that point, run Regedit, go to HKEY_CURRENT_USER/Software/Microsoft/Windows/Current Version/Explorer/Advanced and create a DWORD value called EnableBalloonTips with a value of 0.
13. You can start up without needing to enter a user name or password. Select Run... from the start menu and type 'control userpasswords2', which will open the user accounts application. On the Users tab, clear the box for Users Must Enter A User Name And Password To Use This Computer, and click on OK. An Automatically Log On dialog box will appear; enter the user name and password for the account you want to use.
14. Internet Explorer 6 will automatically delete temporary files, but only if you tell it to. Start the browser, select Tools / Internet Options... and Advanced, go down to the Security area and check the box to Empty Temporary Internet Files folder when browser is closed.
15. XP comes with a free Network Activity Light, just in case you can't see the LEDs twinkle on your network card. Right click on My Network Places on the desktop, then select Properties. Right click on the description for your LAN or dial-up connection, select Properties, then check the Show icon in notification area when connected box. You'll now see a tiny network icon on the right of your task bar that glimmers nicely during network traffic.
16. The Start Menu can be leisurely when it decides to appear, but you can speed things along by changing the registry entry HKEY_CURRENT_USER/Control Panel/Desktop/MenuShowDelay from the default 400 to something a little snappier. Like 0.
17. You can rename loads of files at once in Windows Explorer. Highlight a set of files in a window, then right click on one and rename it. All the other files will be renamed to that name, with individual numbers in brackets to distinguish them. Also, in a folder you can arrange icons in alphabetised groups by View, Arrange Icon By... Show In Groups.
18. Windows Media Player will display the cover art for albums as it plays the tracks -- if it found the picture on the Internet when you copied the tracks from the CD. If it didn't, or if you have lots of pre-WMP music files, you can put your own copy of the cover art in the same directory as the tracks. Just call it folder.jpg and Windows Media Player will pick it up and display it.
19. Windows key + Break brings up the System Properties dialogue box; Windows key + D brings up the desktop; Windows key + Tab moves through the taskbar buttons.
20. The next release of Windows XP, codenamed Longhorn, is due out late next year or early 2003 and won't be much to write home about. The next big release is codenamed Blackcomb and will be out in 2003/2004.
You've read the reviews and digested the key feature enhancements and operational changes. Now it's time to delve a bit deeper and uncover some of Windows XP's secrets.
1. It boasts how long it can stay up. Whereas previous versions of Windows were coy about how long they went between boots, XP is positively proud of its stamina. Go to the Command Prompt in the Accessories menu from the All Programs start button option, and then type 'systeminfo'. The computer will produce a lot of useful info, including the uptime. If you want to keep these, type 'systeminfo > info.txt'. This creates a file called info.txt you can look at later with Notepad. (Professional Edition only).
2. You can delete files immediately, without having them move to the Recycle Bin first. Go to the Start menu, select Run... and type 'gpedit.msc'; then select User Configuration, Administrative Templates, Windows Components, Windows Explorer and find the Do not move deleted files to the Recycle Bin setting. Set it. Poking around in gpedit will reveal a great many interface and system options, but take care -- some may stop your computer behaving as you wish. (Professional Edition only).
3. You can lock your XP workstation with two clicks of the mouse. Create a new shortcut on your desktop using a right mouse click, and enter 'rundll32.exe user32.dll,LockWorkStation' in the location field. Give the shortcut a name you like. That's it -- just double click on it and your computer will be locked. And if that's not easy enough, Windows key + L will do the same.
4. XP hides some system software you might want to remove, such as Windows Messenger, but you can tickle it and make it disgorge everything. Using Notepad or Edit, edit the text file /windows/inf/sysoc.inf, search for the word 'hide' and remove it. You can then go to the Add or Remove Programs in the Control Panel, select Add/Remove Windows Components and there will be your prey, exposed and vulnerable.
5. For those skilled in the art of DOS batch files, XP has a number of interesting new commands. These include 'eventcreate' and 'eventtriggers' for creating and watching system events, 'typeperf' for monitoring performance of various subsystems, and 'schtasks' for handling scheduled tasks. As usual, typing the command name followed by /? will give a list of options -- they're all far too baroque to go into here.
6. XP has IP version 6 support -- the next generation of IP. Unfortunately this is more than your ISP has, so you can only experiment with this on your LAN. Type 'ipv6 install' into Run... (it's OK, it won't ruin your existing network setup) and then 'ipv6 /?' at the command line to find out more. If you don't know what IPv6 is, don't worry and don't bother.
7. You can at last get rid of tasks on the computer from the command line by using 'taskkill /pid' and the task number, or just 'tskill' and the process number. Find that out by typing 'tasklist', which will also tell you a lot about what's going on in your system.
8. XP will treat Zip files like folders, which is nice if you've got a fast machine. On slower machines, you can make XP leave zip files well alone by typing 'regsvr32 /u zipfldr.dll' at the command line. If you change your mind later, you can put things back as they were by typing 'regsvr32 zipfldr.dll'.
9. XP has ClearType -- Microsoft's anti-aliasing font display technology -- but doesn't have it enabled by default. It's well worth trying, especially if you were there for DOS and all those years of staring at a screen have given you the eyes of an astigmatic bat. To enable ClearType, right click on the desktop, select Properties, Appearance, Effects, select ClearType from the second drop-down menu and enable the selection. Expect best results on laptop displays. If you want to use ClearType on the Welcome login screen as well, set the registry entry HKEY_USERS/.DEFAULT/Control Panel/Desktop/FontSmoothingType to 2.
10. You can use Remote Assistance to help a friend who's using network address translation (NAT) on a home network, but not automatically. Get your pal to email you a Remote Assistance invitation and edit the file. Under the RCTICKET attribute will be a NAT IP address, like 192.168.1.10. Replace this with your chum's real IP address -- they can find this out by going to www.whatismyip.com -- and get them to make sure that they've got port 3389 open on their firewall and forwarded to the errant computer.
11. You can run a program as a different user without logging out and back in again. Right click the icon, select Run As... and enter the user name and password you want to use. This only applies for that run. The trick is particularly useful if you need to have administrative permissions to install a program, which many require. Note that you can have some fun by running programs multiple times on the same system as different users, but this can have unforeseen effects.
12. Windows XP can be very insistent about you checking for auto updates, registering a Passport, using Windows Messenger and so on. After a while, the nagging goes away, but if you feel you might slip the bonds of sanity before that point, run Regedit, go to HKEY_CURRENT_USER/Software/Microsoft/Windows/Current Version/Explorer/Advanced and create a DWORD value called EnableBalloonTips with a value of 0.
13. You can start up without needing to enter a user name or password. Select Run... from the start menu and type 'control userpasswords2', which will open the user accounts application. On the Users tab, clear the box for Users Must Enter A User Name And Password To Use This Computer, and click on OK. An Automatically Log On dialog box will appear; enter the user name and password for the account you want to use.
14. Internet Explorer 6 will automatically delete temporary files, but only if you tell it to. Start the browser, select Tools / Internet Options... and Advanced, go down to the Security area and check the box to Empty Temporary Internet Files folder when browser is closed.
15. XP comes with a free Network Activity Light, just in case you can't see the LEDs twinkle on your network card. Right click on My Network Places on the desktop, then select Properties. Right click on the description for your LAN or dial-up connection, select Properties, then check the Show icon in notification area when connected box. You'll now see a tiny network icon on the right of your task bar that glimmers nicely during network traffic.
16. The Start Menu can be leisurely when it decides to appear, but you can speed things along by changing the registry entry HKEY_CURRENT_USER/Control Panel/Desktop/MenuShowDelay from the default 400 to something a little snappier. Like 0.
17. You can rename loads of files at once in Windows Explorer. Highlight a set of files in a window, then right click on one and rename it. All the other files will be renamed to that name, with individual numbers in brackets to distinguish them. Also, in a folder you can arrange icons in alphabetised groups by View, Arrange Icon By... Show In Groups.
18. Windows Media Player will display the cover art for albums as it plays the tracks -- if it found the picture on the Internet when you copied the tracks from the CD. If it didn't, or if you have lots of pre-WMP music files, you can put your own copy of the cover art in the same directory as the tracks. Just call it folder.jpg and Windows Media Player will pick it up and display it.
19. Windows key + Break brings up the System Properties dialogue box; Windows key + D brings up the desktop; Windows key + Tab moves through the taskbar buttons.
20. The next release of Windows XP, codenamed Longhorn, is due out late next year or early 2003 and won't be much to write home about. The next big release is codenamed Blackcomb and will be out in 2003/2004.
Renaming the Start Button
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To rename the start button, you will need a hex editor.
My preference is UltraEdit
Copy the \windows\explore.exe file to a new name (e.g. explorer_1.exe)
With the hex editor, open that file and go to offset 412b6
You will see the word start with blanks between each letter
Edit it be any 5 characters or less
Save the file
Boot to DOS
Copy the existing c:\windows\explorer.exe to explorer.org
Copy explorer_1.exe to explorer.exe
You will also need to replace the explorer.exe in the c:\windows\system32\dllcache file as well with the new one.
Note: If the partition is NTFS and you can't access the files from DOS:
Start Regedit
Go to HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon.
Change the value of Shell from Explorer.exe to explorer_1.exe
My preference is UltraEdit
Copy the \windows\explore.exe file to a new name (e.g. explorer_1.exe)
With the hex editor, open that file and go to offset 412b6
You will see the word start with blanks between each letter
Edit it be any 5 characters or less
Save the file
Boot to DOS
Copy the existing c:\windows\explorer.exe to explorer.org
Copy explorer_1.exe to explorer.exe
You will also need to replace the explorer.exe in the c:\windows\system32\dllcache file as well with the new one.
Note: If the partition is NTFS and you can't access the files from DOS:
Start Regedit
Go to HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon.
Change the value of Shell from Explorer.exe to explorer_1.exe
Change your processor name
Labels:
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computer science,
information,
windows xp,
xp facts
Trick - SHOW YOUR PC PENTIUM 5 OR MORE
GO TO START>RUN>TYPE
REGEDIT>HKEY_LOCAL_MACHINE>HARDWARE>
DISCRIPTION>SYSTEM>CENTRALPROCESSOR>0
ON RIGHT HAND SIDE, RIGHT CLICK ON "PROCESSOR NAME STRING" AND CLICK ON MODIFY
AND WRITE WHAT EVER YOU WANT
GO TO START>RUN>TYPE
REGEDIT>HKEY_LOCAL_MACHINE>HARDWARE>
DISCRIPTION>SYSTEM>CENTRALPROCESSOR>0
ON RIGHT HAND SIDE, RIGHT CLICK ON "PROCESSOR NAME STRING" AND CLICK ON MODIFY
AND WRITE WHAT EVER YOU WANT
Increase your internet speed
Labels:
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computer science,
information,
internet,
windows xp,
xp facts
Go to desktop->My computer-(right click on)->manage->
->Device manager->
now u see a window of Device manager
then go to
Ports->Communication Port(double click on it and Open).
after open u can see a Communication Port properties.
go the Port Setting:----and now increase ur "Bits per second" to 128000.
and "Flow control" change 2 Hardware.
U WILL NOTICE AN IMMEDIATE RESULT
this will increase the receiving capacity of your input port and thus ur netspeed will be increased. :)
->Device manager->
now u see a window of Device manager
then go to
Ports->Communication Port(double click on it and Open).
after open u can see a Communication Port properties.
go the Port Setting:----and now increase ur "Bits per second" to 128000.
and "Flow control" change 2 Hardware.
U WILL NOTICE AN IMMEDIATE RESULT
this will increase the receiving capacity of your input port and thus ur netspeed will be increased. :)
Make your folders invisible without a software.
Labels:
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computer science,
information,
windows xp,
xp facts
1)Right Click on the desktop.
Make a new folder
2)Now rename the folder with a blank space by holding ALT key and type 0160.
3)Now you have a folder without a name.
4)Right click on the folder>properties>customize.
Click on change icon.
5)Scroll a bit, you should find some empty spaces, click on any one of them.
Click ok.
Now drag this folder anywhere such as at the top right or centre such that nobody can guess a folder there.
Thats it, now you can store your personal data without any 3rd party tools
Make a new folder
2)Now rename the folder with a blank space by holding ALT key and type 0160.
3)Now you have a folder without a name.
4)Right click on the folder>properties>customize.
Click on change icon.
5)Scroll a bit, you should find some empty spaces, click on any one of them.
Click ok.
Now drag this folder anywhere such as at the top right or centre such that nobody can guess a folder there.
Thats it, now you can store your personal data without any 3rd party tools
Facts: Windows XP
Labels:
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computer science,
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Get XP Key From CD itself
There is a way to get XP product code from CD itself, it really works!!!
I was once wondering around the XP CD......and got this!!!
Just try it out.....
Just explore the CD then open the folder I386 then open the file UNATTEND.TXT and scroll down to the last line.
You have a product code.
How to Change the Registered Owner and Organization in XP
It is possible to change the name of the registered owner and registered organisation in Windows XP.
For those who dont know how to see the owner and the organisation follow these steps to check.
Right click on My computer, click properties. Under the general tab,there is a line 'Registered to'The first line has the name of the owner and the next line has the name of the organisation.
To change these,follow the steps given below.
1. Click Start, Run and type regedit and press enter. Go to the following location in the registry:
HKEY_LOCAL_MACHINE SOFTWARE Microsoft Windows NT CurrentVersion
2.To change the registered organization, double-click on RegisteredOrganization.Under Value data,type the name that you want, and then click OK.
3.To change the name of the registered owner, double-click RegisteredOwner.
4.Under Value data, type the name that you want, and then click OK.
5.Click Exit on the File menu to quit.
You are done. You make check out the changes as described earlier.
1. Click on your Start button.
2. Go to "Run"
3. Type "control userpasswords2" and click OK button
4. A User Account dialog box will appear.
Uncheck "Users must enter a user name
and password to use this computer."
and click OK button.
5. Another dialog box will appear asking you to type in the DEFAULT user account that you'd like to login
whenever you start your computer. Type in the user name and password. You only need to do this once.
That's it. Only requires 5 steps to automatically login Windows XP. Please take note that this only works
if you're trying to login locally. This feature allows other users to start your computer and use the account that you establish to automatically log on.
Enabling auto logon makes your computer more convenient to use, but can pose a security risk since anyone can just turn
the machine on and access your files.
So be VERY sure that no one else has physical access to your computer.
Am not a big fan of chasing free, open proxies all over the place. I use google instead. Here I describe what I believe is an uncommon way for bypassing blocked sites using google.
1) The first and most common way of using google to bypass blocked sites is just to search for the site and then clicked the "cached"
link that appears on google. Easy, simple, and frequently works for static information.
2) Passing the site through google translator works well as well. Here's the URL to use:
Code:
http://www.google.com/translate?langpair=enen&u=www.blockedsite.com
(where blockedsite.com is the site that you wish to visit)
This translates the site from english to english and works because the ip address will appear as google instead of you.
Here's a link to tech-recipes passed through the translator as an example.
You can actually do this with any langpair. Change enen in the URL above to spanish by using eses and it still works.
3) Unique method that I have not seen described before is to search through google mobile. Google mobile will "convert as you go"
very similiar to the translation method above.
Just search for your site with google mobile and click on the link it provides. Here's is tech-recipes brought up through google
mobile search. Once again, this will allow you to bypass any blocks because the IP request comes from google not for you.
Like the translation method above, google will continue to "proxy" as you continue to visit links through the site.
And ya it is also useful to retrive some information from net which is currently not available.
There is a way to get XP product code from CD itself, it really works!!!
I was once wondering around the XP CD......and got this!!!
Just try it out.....
Just explore the CD then open the folder I386 then open the file UNATTEND.TXT and scroll down to the last line.
You have a product code.
How to Change the Registered Owner and Organization in XP
It is possible to change the name of the registered owner and registered organisation in Windows XP.
For those who dont know how to see the owner and the organisation follow these steps to check.
Right click on My computer, click properties. Under the general tab,there is a line 'Registered to'The first line has the name of the owner and the next line has the name of the organisation.
To change these,follow the steps given below.
1. Click Start, Run and type regedit and press enter. Go to the following location in the registry:
HKEY_LOCAL_MACHINE SOFTWARE Microsoft Windows NT CurrentVersion
2.To change the registered organization, double-click on RegisteredOrganization.Under Value data,type the name that you want, and then click OK.
3.To change the name of the registered owner, double-click RegisteredOwner.
4.Under Value data, type the name that you want, and then click OK.
5.Click Exit on the File menu to quit.
You are done. You make check out the changes as described earlier.
1. Click on your Start button.
2. Go to "Run"
3. Type "control userpasswords2" and click OK button
4. A User Account dialog box will appear.
Uncheck "Users must enter a user name
and password to use this computer."
and click OK button.
5. Another dialog box will appear asking you to type in the DEFAULT user account that you'd like to login
whenever you start your computer. Type in the user name and password. You only need to do this once.
That's it. Only requires 5 steps to automatically login Windows XP. Please take note that this only works
if you're trying to login locally. This feature allows other users to start your computer and use the account that you establish to automatically log on.
Enabling auto logon makes your computer more convenient to use, but can pose a security risk since anyone can just turn
the machine on and access your files.
So be VERY sure that no one else has physical access to your computer.
Am not a big fan of chasing free, open proxies all over the place. I use google instead. Here I describe what I believe is an uncommon way for bypassing blocked sites using google.
1) The first and most common way of using google to bypass blocked sites is just to search for the site and then clicked the "cached"
link that appears on google. Easy, simple, and frequently works for static information.
2) Passing the site through google translator works well as well. Here's the URL to use:
Code:
http://www.google.com/translate?langpair=enen&u=www.blockedsite.com
(where blockedsite.com is the site that you wish to visit)
This translates the site from english to english and works because the ip address will appear as google instead of you.
Here's a link to tech-recipes passed through the translator as an example.
You can actually do this with any langpair. Change enen in the URL above to spanish by using eses and it still works.
3) Unique method that I have not seen described before is to search through google mobile. Google mobile will "convert as you go"
very similiar to the translation method above.
Just search for your site with google mobile and click on the link it provides. Here's is tech-recipes brought up through google
mobile search. Once again, this will allow you to bypass any blocks because the IP request comes from google not for you.
Like the translation method above, google will continue to "proxy" as you continue to visit links through the site.
And ya it is also useful to retrive some information from net which is currently not available.
TELEPRESENCE
Labels:
computer facts,
computer science,
facts,
information
TELEPRESENCE
Telepresence refers to a set of technologies which allow a person to feel as if they
were present, to give the appearance that they were present, or to have an effect, at
a location other than their true location.
It's a new technology by Cisco systems.
Here in this picture, all the people are not in that single room. They are all in different places.
To read more:
Telepresence refers to a set of technologies which allow a person to feel as if theywere present, to give the appearance that they were present, or to have an effect, at
a location other than their true location.
It's a new technology by Cisco systems.
Here in this picture, all the people are not in that single room. They are all in different places.
To read more:
Cisco touts new unified comms and telepresence systems(updaed in 3.4.09)
YOTTABYTE
Labels:
computer facts,
computer science,
facts,
information
YOTTABYTE
The yottabyte is the largest unit of measurement for computer data.A yottabyte is 280, or 1,208,925,819,614,629,174,706,176 bytes. Its estimated value is 1024 or 1,000,000,000,000,000,000,000,000 bytes.
The yottabyte is the largest unit of measurement for computer data.A yottabyte is 280, or 1,208,925,819,614,629,174,706,176 bytes. Its estimated value is 1024 or 1,000,000,000,000,000,000,000,000 bytes.
Thin Computing
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information
Thin Computing delivers the productivity people need, at a lower cost than traditional methods, all without compromising security or manageability. Thin Computing replaces the PC with a Thin or Zero Client, making it easier for IT to manage user desktops by moving their complexity to the data center. Analysts agree that this approach improves the reliability and security of information, dramatically lowers IT costs, reduces energy consumption, and is far better for the environment. Yet Thin Computing still provides the access to applications and data that people need in order to move the business forward. All while improving on the security, reliability, and availability of PCs.
Microsoft job interview include 98 questions as follows:
Labels:
jobs,
microsoft,
placement questions,
question papers
Microsoft job interview include 98 questions as follows:
1. Riddles Microsoft interview
It include 18 interview questions about riddles such as:
. Why is a manhole cover round?
. How many cars are there in the USA?
2. Algorithms Microsoft interview
It include 36 interview questions about Algorithms such as:
. Describe advantages and disadvantages of the various stock sorting algorithms?
. Implement an algorithm to reverse a linked list. Now do it without recursion?
3. Thinkers Microsoft interview
It include 14 interview questions about thinkers such as:
. Why do you want to work at Microsoft?
. If you are going to receive an award in 5 years, what is it for and who is the audience?
4. Applications Microsoft interview
It include 10 interview questions about applications such as:
. If you could add any feature to Microsoft Word, what would it be?
. How would you go about building a keyboard for 1-handed users?
5. Microsoft phone interview
It include 20 phone interview questions such as:
. How would you design a toaster? (sometimes elevator).
. How would you debug your toaster? (sometimes elevator).
Source: Microsoft interview questions
1. Riddles Microsoft interview
It include 18 interview questions about riddles such as:
. Why is a manhole cover round?
. How many cars are there in the USA?
2. Algorithms Microsoft interview
It include 36 interview questions about Algorithms such as:
. Describe advantages and disadvantages of the various stock sorting algorithms?
. Implement an algorithm to reverse a linked list. Now do it without recursion?
3. Thinkers Microsoft interview
It include 14 interview questions about thinkers such as:
. Why do you want to work at Microsoft?
. If you are going to receive an award in 5 years, what is it for and who is the audience?
4. Applications Microsoft interview
It include 10 interview questions about applications such as:
. If you could add any feature to Microsoft Word, what would it be?
. How would you go about building a keyboard for 1-handed users?
5. Microsoft phone interview
It include 20 phone interview questions such as:
. How would you design a toaster? (sometimes elevator).
. How would you debug your toaster? (sometimes elevator).
Source: Microsoft interview questions
How many positive factors of 36,000,000 are not perfect squares?
Labels:
IQ teasers,
maths,
puzzle,
think to answer
Question: How many of the positive factors of the number 36,000,000 are not perfect squares.
Any answer without an explanation is spam.
Ans.
My answer is 149.Is it right or wrong??
Here goes my explanation:
36000000=6 x 6 x 10 x 10 x 10 x 10 x 10 x 10
=2 x 3 x 2 x 3 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5
=28 x 32 x 56
Factors possible are:
1
2, 22, 23, 24, 25, 26, 27, 28
3, 32
5, 52, 53, 54, 55, 56
For each (2 to 28 and 3 to 32 ) there will be total 16 (8 x 2) combinations of factors having subfactors 2 and 3 only.
2 x 3, 22 x 3, 23 x 3, 24 x 3, 25 x 3, 26 x 3, 27 x 3, 28 x 3
2 x 32, 22 x 32, 23 x 32, 24 x 32, 25 x 32, 26 x 32, 27 x 32, 28 x 32
Similarly for each (2 to 28 and 5 to 56 ) there will be total 48(8 x 6) combinations of factors having subfactors 2 and 5 only.
2 x 5, 22 x 5, 23 x5, 24 x 5, 25 x 5, 26 x 5, 27 x 5, 28 x 5
2 x 52, 22 x 52, 23 x 52, 24 x 52, 25 x 52, 26 x 52, 27 x 52, 28 x 52
2 x 53, 22 x 53, 23 x 53, 24 x 53, 25 x 53, 26 x 53, 27 x 53, 28 x 53
2 x 54, 22 x 54, 23 x 54, 24 x 54, 25 x 54, 26 x 54, 27 x 54, 28 x 54
2 x 55, 22 x 55, 23 x 55, 24 x 55, 25 x 55, 26 x 55, 27 x 55, 28 x 55
2 x 56, 22 x 56, 23 x 56, 24 x 56, 25 x 56, 26 x 56, 27 x 56, 28 x 56
For each (3 to 32 and 5 to 56 ) there will be total 12 (6 x 2) combinations of factors having subfactors 3 and 5 only.
3 x 5, 32 x 5
3 x 52, 32 x 52
3 x 53, 32 x 53
3 x 54, 32 x 54
3 x 55, 32 x 55
3 x 56, 32 x 56
Again for each (2 to 28 and 3 to 32 and 5 to 56 ) there will be total 96 (8 x 2 x 6) combinations of factors having subfactors 2,3 and 5 only.
2 x 3 x 5, 22x 3 x 5, 23x 3 x 5, 24 x 3 x 5, 25 x 3 x 5, 26 x 3 x 5, 27 x 3 x 5, 28 x 3 x 5
2 x 32 x 5 , 22x 32 x 5,23x 32 x 5, 24 x 32 x 5, 25 x 32 x 5, 26 x 32 x 5, 27 x 32 x 5, 28 x 32 x 5
2 x 3x 52, 22x 3 x 52, 23x 3 x 52, 24 x 3 x 52, 25 x 3 x 52, 26 x 3 x 52, 27 x 3 x 52, 28 x 3 x 52
2 x 32 x 52 , 22x 32 x 52, 23x 32 x 52, 24 x 32 x 52, 25 x 32 x 52, 26 x 32 x 52, 27 x 32 x 52, 28 x 32 x 52
2 x 3x 53, 22x 3 x 53, 23x 3 x 53, 24 x 3 x 53, 25 x 3 x 53, 26 x 3 x 53, 27 x 3 x 53, 28 x 3 x 53
2 x 32 x 53 , 22x 32 x 53, 23x 32 x 53, 24 x 32 x 53, 25 x 32 x 53, 26 x 32 x 53, 27 x 32 x 53, 28 x 32 x 53
2 x 3x 54, 22x 3 x 54, 23x 3 x 54, 24 x 3 x 54, 25 x 3 x 54, 26 x 3 x 54, 27 x 3 x 54, 28 x 3 x 54
2 x 32 x 54, 22x 32 x 54, 23x 32 x 54, 24 x 32 x 54, 25 x 32 x 54, 26 x 32 x 54, 27 x 32 x 54, 28 x 32 x 54
2 x 3x 55, 22x 3 x 55, 23x 3 x 55, 24 x 3 x 55, 25 x 3 x 55, 26 x 3 x 55, 27 x 3 x 55, 28 x 3 x 55
2 x 32 x 55 , 22x 32 x 55, 23x 32 x 55, 24 x 32 x 55, 25 x 32 x 55, 26 x 32 x 55, 27 x 32 x 55, 28 x 32 x 55
2 x 3x 56, 22x 3 x 56, 23x 3 x 56, 24 x 3 x 56, 25 x 3 x 56, 26 x 3 x 56, 27 x 3 x 56, 28 x 3 x 56
2 x 32 x 56, 22x 32 x 56, 23x 32 x 56, 24 x 32 x 56, 25 x 32 x 56, 26 x 32 x 56, 27 x 32 x 56, 28 x 32 x 56
And finally 28 x 32 x 56 itself is also a factor
So counting all those factors whose subfactor's exponential power is an even no, I get total no of factors of 36000000 which are not perfect squares as 149.
All such factors are marked in bold.
Any answer without an explanation is spam.
Ans.
My answer is 149.Is it right or wrong??
Here goes my explanation:
36000000=6 x 6 x 10 x 10 x 10 x 10 x 10 x 10
=2 x 3 x 2 x 3 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5 x 2 x 5
=28 x 32 x 56
Factors possible are:
1
2, 22, 23, 24, 25, 26, 27, 28
3, 32
5, 52, 53, 54, 55, 56
For each (2 to 28 and 3 to 32 ) there will be total 16 (8 x 2) combinations of factors having subfactors 2 and 3 only.
2 x 3, 22 x 3, 23 x 3, 24 x 3, 25 x 3, 26 x 3, 27 x 3, 28 x 3
2 x 32, 22 x 32, 23 x 32, 24 x 32, 25 x 32, 26 x 32, 27 x 32, 28 x 32
Similarly for each (2 to 28 and 5 to 56 ) there will be total 48(8 x 6) combinations of factors having subfactors 2 and 5 only.
2 x 5, 22 x 5, 23 x5, 24 x 5, 25 x 5, 26 x 5, 27 x 5, 28 x 5
2 x 52, 22 x 52, 23 x 52, 24 x 52, 25 x 52, 26 x 52, 27 x 52, 28 x 52
2 x 53, 22 x 53, 23 x 53, 24 x 53, 25 x 53, 26 x 53, 27 x 53, 28 x 53
2 x 54, 22 x 54, 23 x 54, 24 x 54, 25 x 54, 26 x 54, 27 x 54, 28 x 54
2 x 55, 22 x 55, 23 x 55, 24 x 55, 25 x 55, 26 x 55, 27 x 55, 28 x 55
2 x 56, 22 x 56, 23 x 56, 24 x 56, 25 x 56, 26 x 56, 27 x 56, 28 x 56
For each (3 to 32 and 5 to 56 ) there will be total 12 (6 x 2) combinations of factors having subfactors 3 and 5 only.
3 x 5, 32 x 5
3 x 52, 32 x 52
3 x 53, 32 x 53
3 x 54, 32 x 54
3 x 55, 32 x 55
3 x 56, 32 x 56
Again for each (2 to 28 and 3 to 32 and 5 to 56 ) there will be total 96 (8 x 2 x 6) combinations of factors having subfactors 2,3 and 5 only.
2 x 3 x 5, 22x 3 x 5, 23x 3 x 5, 24 x 3 x 5, 25 x 3 x 5, 26 x 3 x 5, 27 x 3 x 5, 28 x 3 x 5
2 x 32 x 5 , 22x 32 x 5,23x 32 x 5, 24 x 32 x 5, 25 x 32 x 5, 26 x 32 x 5, 27 x 32 x 5, 28 x 32 x 5
2 x 3x 52, 22x 3 x 52, 23x 3 x 52, 24 x 3 x 52, 25 x 3 x 52, 26 x 3 x 52, 27 x 3 x 52, 28 x 3 x 52
2 x 32 x 52 , 22x 32 x 52, 23x 32 x 52, 24 x 32 x 52, 25 x 32 x 52, 26 x 32 x 52, 27 x 32 x 52, 28 x 32 x 52
2 x 3x 53, 22x 3 x 53, 23x 3 x 53, 24 x 3 x 53, 25 x 3 x 53, 26 x 3 x 53, 27 x 3 x 53, 28 x 3 x 53
2 x 32 x 53 , 22x 32 x 53, 23x 32 x 53, 24 x 32 x 53, 25 x 32 x 53, 26 x 32 x 53, 27 x 32 x 53, 28 x 32 x 53
2 x 3x 54, 22x 3 x 54, 23x 3 x 54, 24 x 3 x 54, 25 x 3 x 54, 26 x 3 x 54, 27 x 3 x 54, 28 x 3 x 54
2 x 32 x 54, 22x 32 x 54, 23x 32 x 54, 24 x 32 x 54, 25 x 32 x 54, 26 x 32 x 54, 27 x 32 x 54, 28 x 32 x 54
2 x 3x 55, 22x 3 x 55, 23x 3 x 55, 24 x 3 x 55, 25 x 3 x 55, 26 x 3 x 55, 27 x 3 x 55, 28 x 3 x 55
2 x 32 x 55 , 22x 32 x 55, 23x 32 x 55, 24 x 32 x 55, 25 x 32 x 55, 26 x 32 x 55, 27 x 32 x 55, 28 x 32 x 55
2 x 3x 56, 22x 3 x 56, 23x 3 x 56, 24 x 3 x 56, 25 x 3 x 56, 26 x 3 x 56, 27 x 3 x 56, 28 x 3 x 56
2 x 32 x 56, 22x 32 x 56, 23x 32 x 56, 24 x 32 x 56, 25 x 32 x 56, 26 x 32 x 56, 27 x 32 x 56, 28 x 32 x 56
And finally 28 x 32 x 56 itself is also a factor
So counting all those factors whose subfactor's exponential power is an even no, I get total no of factors of 36000000 which are not perfect squares as 149.
All such factors are marked in bold.
Which of the following statements are true?
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IQ teasers,
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try to explain
Which of the following statements are true? [ with your own reasoning, of course! ]
1 This is a numbered list of twelve statements.
2 Exactly 3 of the last 6 statements are true.
3 Exactly 2 of the even-numbered statements are true.
4 If statement 5 is true, then statements 6 and 7 are both true.
5 The 3 preceding statements are all false.
6 Exactly 4 of the odd-numbered statements are true.
7 Either statement 2 or 3 is true, but not both.
8 If statement 7 is true, then 5 and 6 are both true.
9 Exactly 3 of the first 6 statements are true.
10 The next two statements are both true.
11 Exactly 1 of statements 7, 8 and 9 are true.
12 Exactly 4 of the preceding statements are true.
Ans.
1,8,10,11,12
Logic:
1 is anyways true.
Assume that 12 is true.So we are left with 3 more statements from 2 to 11 which can be true.
We put 10 as true which makes 11 true, 12 is already true(we have assumed).If 11 is true then either 7,8,9 should be true. Only 8 satisfies the condition.
1 This is a numbered list of twelve statements.
2 Exactly 3 of the last 6 statements are true.
3 Exactly 2 of the even-numbered statements are true.
4 If statement 5 is true, then statements 6 and 7 are both true.
5 The 3 preceding statements are all false.
6 Exactly 4 of the odd-numbered statements are true.
7 Either statement 2 or 3 is true, but not both.
8 If statement 7 is true, then 5 and 6 are both true.
9 Exactly 3 of the first 6 statements are true.
10 The next two statements are both true.
11 Exactly 1 of statements 7, 8 and 9 are true.
12 Exactly 4 of the preceding statements are true.
Ans.
1,8,10,11,12
Logic:
1 is anyways true.
Assume that 12 is true.So we are left with 3 more statements from 2 to 11 which can be true.
We put 10 as true which makes 11 true, 12 is already true(we have assumed).If 11 is true then either 7,8,9 should be true. Only 8 satisfies the condition.
Find the a,b and c
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Find the a,b and c
987654321a + 123456789b + c = (a + b + c)³
The Ant problem
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An ant is at a fixed end 'P' of a 1 meter-long rubber band.
Just as the ant starts walking along the rubber band at a constant 1 cm/sec,
the other end 'Q' is pulled away from 'P' at a steady speed of 100 cm/sec.
Assume a uniformly stretching, infinitely elastic rubber band is used in this puzzle.
Will the ant ever reach 'Q', and if yes, when?
Try this kids.
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You have to use the mathematical operators in between the numbers to get the correct output....
1 1 1 =6
2 2 2 =6
3 3 3 =6
4 4 4 =6
5 5 5 =6
6 6 6 =6
7 7 7 =6
8 8 8 =6
9 9 9 =6
its very simple ,you all can easily solve it....
Ans:
(1+1+1)! = 6
2+2+2 = 6
3x3-3 = 6
4+4-(sqrt 4) = 6 [positive square root]
(5/5)+5 = 6
6-6+6 = 6
7-(7/7) = 6
8-sqrt(8/(cube root(8))) = 6
(squrt 9) x (sqrt 9) - (sqrt 9) =6
1 1 1 =6
2 2 2 =6
3 3 3 =6
4 4 4 =6
5 5 5 =6
6 6 6 =6
7 7 7 =6
8 8 8 =6
9 9 9 =6
its very simple ,you all can easily solve it....
Ans:
(1+1+1)! = 6
2+2+2 = 6
3x3-3 = 6
4+4-(sqrt 4) = 6 [positive square root]
(5/5)+5 = 6
6-6+6 = 6
7-(7/7) = 6
8-sqrt(8/(cube root(8))) = 6
(squrt 9) x (sqrt 9) - (sqrt 9) =6
Mirror puzzle
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Imagine you are standing in front of a mirror, facing it. Raise your left hand. Raise your right hand. Look at your reflection. When you raise your left hand your reflection raises what appears to be his right hand. But when you tilt your head up, your reflection does too, and does not appear to tilt his/her head down. Why is it that the mirror appears to reverse left and right, but not up and down?
Ans.
Ans.
Find the number?
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The series is -
12,12,18,45,180,1170,?
What's the next number in above series?
Ans.
Yep, my answer matches with that of bayazidahmed, 12285.
Here's the solution:
Lets name the general term of the sequence T(n)
The sequence (say R(n)) where R(n)=T(n+1)/T(n)
is 1,1.5,2.5,4,6.5...
The sequence (say S(n)) where S(n)=R(n+1)-R(n)
is 0.5,1,1.5,2.5....
Thus S(n) can be thought of a Fibonacci style sequence where S(n)=S(n-1)+S(n-2)
Considering this relation, the next term in S(n) would be 1.5+2.5=4
Considering this, the next term in R(n) would be 6.5+4=10.5
Thus the next term in T(n)=1170*10.5 = 12285
12,12,18,45,180,1170,?
What's the next number in above series?
Ans.
Yep, my answer matches with that of bayazidahmed, 12285.
Here's the solution:
Lets name the general term of the sequence T(n)
The sequence (say R(n)) where R(n)=T(n+1)/T(n)
is 1,1.5,2.5,4,6.5...
The sequence (say S(n)) where S(n)=R(n+1)-R(n)
is 0.5,1,1.5,2.5....
Thus S(n) can be thought of a Fibonacci style sequence where S(n)=S(n-1)+S(n-2)
Considering this relation, the next term in S(n) would be 1.5+2.5=4
Considering this, the next term in R(n) would be 6.5+4=10.5
Thus the next term in T(n)=1170*10.5 = 12285
Where lies the flaw in the logic?
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You can imagine an arrow in flight, toward a target. For the arrow to reach the target, the arrow must first travel half of the overall distance from the starting point to the target. Next, the arrow must travel half of the remaining distance.
For example, if the starting distance was 10m, the arrow first travels 5m, then 2.5m.
If you extend this concept further, you can imagine the resulting distances getting smaller and smaller. Will the arrow ever reach the target?
For example, if the starting distance was 10m, the arrow first travels 5m, then 2.5m.
If you extend this concept further, you can imagine the resulting distances getting smaller and smaller. Will the arrow ever reach the target?
Ponder this?
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Imagine a prisoner in a prison. He is sentenced to death and has been told that he will be killed on one day of the following week. He has been assured that the day will be a surprise to him, so he will not be anticipating the hangman on a particular day, thus keeping his stress levels in check.
The prisoner starts to think to himself, if I am still alive on Thursday,
then clearly I shall be hanged on Friday, this would mean that I then know the day of my death, therefore I cannot be hanged on Friday. Now then, if I am still alive on Wednesday, then clearly I shall be hanged on Thursday, since I have already ruled out Friday. The prisoner works back with this logic, finally concluding that he cannot after all be hanged, without already knowing which day it was.
Casually, resting on his laurels, sitting in his prison cell on Tuesday, the warden arrives to take him to be hanged, the prisoner was obviously surprised!
Ponder this?
The prisoner starts to think to himself, if I am still alive on Thursday,
then clearly I shall be hanged on Friday, this would mean that I then know the day of my death, therefore I cannot be hanged on Friday. Now then, if I am still alive on Wednesday, then clearly I shall be hanged on Thursday, since I have already ruled out Friday. The prisoner works back with this logic, finally concluding that he cannot after all be hanged, without already knowing which day it was.Casually, resting on his laurels, sitting in his prison cell on Tuesday, the warden arrives to take him to be hanged, the prisoner was obviously surprised!
Ponder this?
Find the numbers
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I'm thinking of two integer numbers, each of them is more than 1 and their sum is less than 100.
I tell my friend CEan - Ash the sum of these two numbers, and another friend, CEan - MaRo, product of these two numbers.
Then such a dialog took place:
Ash: I can't determine what are these numbers.
MaRo: Ah, i knew you wouldn't be able to do this.
Ash: Oh, then i know what they are!
MaRo: Oh, then i know them too!
Can you determine the numbers?
Ans:
Assumption : Both numbers should be more than 1
since Ash and Mac knew sum and other the product...but they never exchange information abt sum/product....
if numbers are 2,2
Ash knows 4....but basic priciple is both numbers are more than one so
1,3(it differs because...one number is equal to one)
2,2
and Mach know 4...
so it can be
1,4 (it differs because...on number is equal to one)
2,2
............................
if numbers are 2,3
Ash knows 5....but basic priciple is both numbers are more than one so
1,4(it differs because...one number is equal to one)
2,3
and Mach know 6...
so it can be
1,6 (it differs because...on number is equal to one)
2,3
1 < x < y and x+y < 100 [x,y are the numbers].
But, is the answer, right?
Think harder!
I tell my friend CEan - Ash the sum of these two numbers, and another friend, CEan - MaRo, product of these two numbers.
Then such a dialog took place:
Ash: I can't determine what are these numbers.
MaRo: Ah, i knew you wouldn't be able to do this.
Ash: Oh, then i know what they are!
MaRo: Oh, then i know them too!
Can you determine the numbers?
Ans:
Assumption : Both numbers should be more than 1
since Ash and Mac knew sum and other the product...but they never exchange information abt sum/product....
if numbers are 2,2
Ash knows 4....but basic priciple is both numbers are more than one so
1,3(it differs because...one number is equal to one)
2,2
and Mach know 4...
so it can be
1,4 (it differs because...on number is equal to one)
2,2
............................
if numbers are 2,3
Ash knows 5....but basic priciple is both numbers are more than one so
1,4(it differs because...one number is equal to one)
2,3
and Mach know 6...
so it can be
1,6 (it differs because...on number is equal to one)
2,3
1 < x < y and x+y < 100 [x,y are the numbers].
But, is the answer, right?
Think harder!
Try this lock puzzle
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IQ teasers,
placement questions,
puzzle
You want to get through a security door, where you have to enter 3 digits as password, where each digit can be any from 0 to 9. The checking mechanism is, however, defective, and so will let you in if any 2 of your digits match with the password's. e.g. if the password is 087 and you enter 057, then you will be let in. You don't have much time and hence want to make as few tries as possible. What is the minimum number of tries in which you can definitely enter, and what are they (you need not give explicitly, if you describe a pattern).
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