Brain Teaser

Get ready for brain teasing exercise with the latest collection of Brain Teasers, Riddles, puzzles and much more. Brain teasers are the puzzles that requires thought to solve with thinking in unconventional ways with given constraints in mind, it also involves lateral thinking, Logic puzzles and riddles which are some specific types of brain teasers. Here at puzzlefry you'll enjoy wide range of Brain Teasers which will tease your Brain and make it extra ordinary, Lets try few listed below -
  • Assuming that there are nearly 7,000,000,000 (7 billion) people on Earth, estimate the size of number you’d get if you multiplied together the number of fingers on everyone’s hands.

    For this calculation, it might be easier to count a thumb as a finger.

    How many zeroes would this number have? How many beaches of sand would this be?

    How far into the galaxy could we reach if your answer was converted to miles?

    How many zebras would you need to have this many hairs?

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  • Last night, I was looking at a road sign and could see that Leeds was 13 miles away, Stoke was 13 miles away and Leek was 10 miles away.

    Unfortunately it was too dark to see how far it was to Manchester. Can you help me?

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  • During the recent Puzzlefry school sports day, four girls were competing in the 400 meters hurdles. Official figures mysteriously went missing just after the event, however, various spectators could remember the following information. Josie was never suspected though!

    1. Jane won and wore red.
    2. The girl wearing number 1 came third.
    3. Julie beat the girl in yellow, but wasn’t wearing number 2.
    4. Only one girl finished in the same position as the number she wore, but she didn’t wear red.
    5. Jackie beat the girl wearing number 3 and Josie wore yellow.
    6. The girl in green wore number 2.
    7. A spectator remembered one girl wore blue, but couldn’t remember anything else about her.

    Can you determine the positions the girls finished in, along with the numbers and colors they wore?

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  • If 5 cats can catch 5 rats in 5 minutes.

    How many cats do you need to catch 100 rats in 100 minutes?

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  • Yesterday John’s mother asked him to buy some stamps. Stamps, in the land of Puzzlefry, are available in 3p, 9p, 11p, 17p and 21p denominations.

    For three types of stamp John was asked to buy eight of each. For the other two types of stamp, he was asked to buy nine of each.

    Unfortunately he forgot which he was supposed to buy eight of and which to buy nine of.

    Luckily his mother had given him the exact money required to buy the stamps, £5.00 and the shopkeeper was able to give him the correct stamps.

    Which stamps did he buy?

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  • I traveled from London to Glasgow last week at 60 miles per hour, I had filled my petrol tank just before I left, so it was full with 25 gallons.

    Unfortunately, my petrol tank sprang a leak immediately and I only managed to drive 300 miles before I ran out of petrol.

    My car does 30 miles per gallon, how fast was I losing petrol through the hole?

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  • Can you find a five digit number which when you place a 7 at the beginning to make a new number is five times larger than when you place the 7 at the end?

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  • What 5 digit number am I thinking of.

    It has two prime digits.

    Digit 3 is the highest digit.
    Digit 2 is lowest digit.
    Digit 1 is higher than the sum of digits 4 and 5.
    Digit 5 is half of digit 4.
    Digit 1 is one smaller than digit 3.
    Digit 5 is between digit 2 and digit 1
    There are no duplicates and the digit 0 does not appear.

    Do not forget that 1 is not prime.

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  • Santa is getting ready – sorting presents, filling sacks and working out his route to make sure he can deliver all his wonderful presents. The trouble is, every year just before Christmas, the reindeer have nothing to do and mostly stand around getting rather bored. They are always asking if they can help but there’s nothing they can do until Santa’s ready to go.

    This year, Santa is prepared for them and he’s set them a little challenge to help keep them busy. He’s given them the following problem:

    Five children from five different families living in five different counties of England have asked for a different gift each. From the clues, the reindeer have to work out who’s who, where each child lives and what present each has asked for. The first reindeer to solve the problem gets an extra portion of Christmas pudding on Christmas Day!

    1. Neither Cliff, nor Jennifer Feather (who does not live in Yorkshire), lives in Kent.

    2. Young Crawford, who is neither Sarah nor Cliff, asked for the pony (a gift that Santa would have particular difficulty getting down the Crawford family’s chimney!).

    3. Young Rowlands is neither the child who lives in Yorkshire nor the child who has asked for a bicycle.

    4. The gift due for delivery to Cornwall, which is not for the child surnamed Rowlands, is a computer.

    5. Liz, who has asked for the painting set, is not from Kent. Her surname is not Jamison.

    6. The child who lives in Essex has asked for a guitar. Alan lives in Cumbria.

    Children’s first names : Alan, Cliff, Jennifer, Liz, Sarah
    Children’s last names : Crawford, Feather, Jamison, Northey, Rowlands
    Counties : Cornwall, Cumbria, Essex, Kent, Yorkshire
    Presents : Bicycle, Computer, Guitar, Painting Set, Pony

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  • Using the Puzzlefry E-commerce solution, Jacob ordered a fishing rod, priced at $6.36.

    Unfortunately, Jacob is an fisherman who lives in a very remote part of Greenland and the import rules there forbid any package longer than 5 feet to be imported.

    The fishing rod was 5 feet and 1 inch, just a little long, so how can the fishing rod be dispatched to Jacob without breaking the rules? Ideally Jacob would like the fishing rod to arrive in one piece!

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