• Brain Teasers & Puzzles

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    • Bus moving left or right – Easiest but the toughtest puzzle to fry

      In karol Bagh,Delhi,India from puzzleFry’s office window  i saw this bus and confused Which direction is the bus going,

      Can you help me out, is it going left or right?

      Hint: Out of the box and enter inside the box

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      SherlockHolmes Expert Pictorial Puzzle.
      • 1,642.2K views
      • 1 answers
      • 2 votes

    • WHICH IS THE FAKE COIN

      You have twelve coins. You know that one is fake. The only thing that distinguishes the fake coin from the real coins is that its weight is imperceptibly different. You have a perfectly balanced scale. The scale only tells you which side weighs more than the other side.

      What is the smallest number of times you must use the scale in order to always find the fake coin?

      Use only the twelve coins themselves and no others, no other weights, no cutting coins, no pencil marks on the scale. etc.

      These are modern coins, so the fake coin is not necessarily lighter.

      Presume the worst case scenario, and don’t hope that you will pick the right coin on the first attempt.

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      ravi Expert No Category.
      • 1,643.8K views
      • 1 answers
      • 0 votes


    • SAVE THE MANKIND

      A stark raving mad king tells his 100 wisest men he is about to line them up and that he will place either a red or blue hat on each of their heads. Once lined up, they must not communicate amongst themselves. Nor may they attempt to look behind them or remove their own hat.

      The king tells the wise men that they will be able to see all the hats in front of them. They will not be able to see the color of their own hat or the hats behind them, although they will be able to hear the answers from all those behind them.

      The king will then start with the wise man in the back and ask “what color is your hat?” The wise man will only be allowed to answer “red” or “blue,” nothing more. If the answer is incorrect then the wise man will be silently killed. If the answer is correct then the wise man may live but must remain absolutely silent.

      The king will then move on to the next wise man and repeat the question.

      The king makes it clear that if anyone breaks the rules then all the wise men will die, then allows the wise men to consult before lining them up. The king listens in while the wise men consult each other to make sure they don’t devise a plan to cheat. To communicate anything more than their guess of red or blue by coughing or shuffling would be breaking the rules.

      What is the maximum number of men they can be guaranteed to save?

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      ravi Expert Puzzles.
      • 1,641.6K views
      • 1 answers
      • 0 votes


    • FIND POISONED BOTTLE ELSE DIE

      You are the ruler of a medieval empire and you are about to have a celebration tomorrow. The celebration is the most important party you have ever hosted. You’ve got 1000 bottles of wine you were planning to open for the celebration, but you find out that one of them is poisoned.

      The poison exhibits no symptoms until death. Death occurs within ten to twenty hours after consuming even the minutest amount of poison.

      You have over a thousand slaves at your disposal and just under 24 hours to determine which single bottle is poisoned.

      You have a handful of prisoners about to be executed, and it would mar your celebration to have anyone else killed.

      What is the smallest number of prisoners you must have to drink from the bottles to be absolutely sure to find the poisoned bottle within 24 hours?

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      ravi Expert Puzzles.
      • 1,641.6K views
      • 1 answers
      • 0 votes

    • APPLY MATHS AND LOGIC

      A frog is at the bottom of a 30 meter well. Each day he summons enough energy for one 3 meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

      Note: Assume after the first leap that his hind legs are exactly three meters up the well. His hind legs must clear the well for him to escape.

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      ravi Expert Puzzles.
      • 1,641.3K views
      • 1 answers
      • 0 votes

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