• Brain Teasers & Puzzles

    Questions Per Page:
    • 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

      View Solution
      Submit Solution
      SherlockHolmes Expert Pictorial Puzzle.
      • 1,624.4K 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.

      View Solution
      Submit Solution
      ravi Expert No Category.
      • 1,625.9K 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?

      View Solution
      Submit Solution
      ravi Expert Puzzles.
      • 1,623.8K 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?

      View Solution
      Submit Solution
      ravi Expert Puzzles.
      • 1,623.8K 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.

      View Solution
      Submit Solution
      ravi Expert Puzzles.
      • 1,623.4K views
      • 1 answers
      • 0 votes

    • FIND THE RIGHT DOOR

      You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don’t know which is which.

      There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.

      You can, however, ask one robot one question. The problem is one robot always tells the truth ,the other always lies and you don’t know which is which.

      What is the question you ask?

      View Solution
      Submit Solution
      ravi Expert Puzzles.
      • 1,626.6K views
      • 1 answers
      • -1 votes


    • CHRISTMAS BRAIN TEASER

      Four angels sat on the Christmas tree amidst other ornaments. Two had blue halos and two – yellow. However, none of them could see above his head. Angel A sat on the top branch and could see the angels B and C, who sat below him. Angel B, could see angel C who sat on the lower branch. And angel D stood at the base of the tree obscured from view by a thicket of branches, so no one could see him and he could not see anyone either.
      Which one of them could be the first to guess the color of his halo and speak it out loud for all other angels to hear?

      View Solution
      Submit Solution
      ravi Expert Microsoft Interview Puzzles.
      • 1,625.9K views
      • 1 answers
      • 0 votes

    • COLOUR OF HEADBAND???

      Three Palefaces were taken captive by a hostile Indian tribe. According to tribe’s custom they had to pass an intelligence test, or die.
      The chieftain showed 5 headbands – 2 red and 3 white. The 3 men were blindfolded and positioned one after another, face to back. The chief put a headband on each of their heads, hid two remaining headbands, and removed their blindfolds. So the third man could see the headbands on the two men in front of him, the second man could see the headband on the first, and the first could not see any headbands at all.
      According to the rules any one of the three men could speak first and try to guess his headband color. And if he guessed correctly – they passed the test and could go free, if not – they failed. It so happened that all 3 Palefaces were prominent logicians from a nearby academy. So after a few moments of silence, the first man in the line said: “My headband is …”.
      What color was his head band? Why?

      View Solution
      Submit Solution
      ravi Expert Interview Puzzles.
      • 1,624.5K views
      • 1 answers
      • 0 votes

    • MASTERS OF LOGIC PUZZLES (HATS)

      After losing the “Spot on the Forehead” contest, the two defeated Puzzle Masters complained that the winner had made a slight pause before raising his hand, thus derailing their deductive reasoning train of thought. And so the Grand Master vowed to set up a truly fair test to reveal the best logician amongst them.
      He showed the three men 5 hats – two white and three black. Then he turned off the lights in the room and put a hat on each Puzzle Master’s head. After that the old sage hid the remaining two hats, but before he could turn the lights on, one of the Masters, as chance would have it, the winner of the previous contest, announced the color of his hat. And he was right once again.
      What color was his hat? What could have been his reasoning?

      View Solution
      Submit Solution
      ravi Expert Interview Puzzles.
      • 1,627.0K views
      • 1 answers
      • 0 votes


    • FIND THE WISEST MAN

      Three Masters of Logic wanted to find out who was the wisest amongst them. So they turned to their Grand Master, asking to resolve their dispute.
      “Easy,” the old sage said. “I will blindfold you and paint either red, or blue dot on each man’s forehead. When I take your blindfolds off, if you see at least one red dot, raise your hand. The one, who guesses the color of the dot on his forehead first, wins.”
      And so it was said, and so it was done. The Grand Master blindfolded the three contestants and painted red dots on every one. When he took their blindfolds off, all three men raised their hands as the rules required, and sat in silence pondering. Finally, one of them said: “I have a red dot on my forehead.”
      How did he guess?

      View Solution
      Submit Solution
      ravi Expert Puzzles.
      • 1,624.1K views
      • 2 answers
      • 0 votes

  • More puzzles to try-

  • Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle