All Puzzles

  • Dangerous adventure riddle

    John is on a dangerous adventure in the jungle. Suddenly an extremely poisonous snake bites him. Luckily, he has his medicines with him against this deadly snake poison: two bottles, labelled A and B, containing three pills each. Exactly three times, with an interval of 2 hours, he needs to swallow simultaneously both a pill A and a pill B. In a rush, he takes a pill from bottle A and then shakes a pill from bottle B with it. However, unfortunately two pills B fall from the bottle and they look completely identical to pill A. He cannot tell which of the three pills is A and which two are B. Stan is desperate: if he does not take the pills exactly as prescribed, it will be fatal.

    How can John survive?

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    SherlockHolmes Expert Logic Puzzles.
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  • If BIKE is coded as 64 , CAR is coded as 27 , TRUCK is coded as 125 ..how do you code TRACTOR ?

    If BIKE is coded as 64 ,
    CAR is coded as 27 ,
    TRUCK is coded as 125

    How do you code TRACTOR ?

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    PANKAJ Genius Logic Puzzles.
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  • School time riddle

    A boy leaves home in the morning to go to school. At the moment that he leaves the house, he looks at the clock in the mirror. The clock has no number indication and for this reason, the boy makes a mistake in interpreting the time (mirror image). Just assuming the clock must be out of order, the boy cycles to school, where he arrives after twenty minutes. At that moment, the clock at school shows a time that is two and a half hours later than the time that the boy saw on the clock at home.

    At what time did he reach school?

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    SherlockHolmes Expert Logic Puzzles.
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  • Cash a car riddle

    A man is going to an Antique Car auction. All purchases must be paid for in cash. He goes to the bank and draws out $25,000.

    Since the man does not want to be seen carrying that much money, he places it in 15 envelopes numbered 1 through 15, in such a way that he can pay any amount up to $25,000 without having to open any envelope. Each envelope contains the least number of bills possible of any available US currency (for example, no two tens instead of a twenty).

    At the auction, he makes a successful bid of $8322 for a car. He hands the auctioneer envelopes 2, 8, and 14. After opening the envelopes, the auctioneer finds exactly the right amount.

    The question: How many ones did the auctioneer find in the envelopes?

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    SherlockHolmes Expert Logic Puzzles.
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  • Crossing a Bridge riddle

    Four men want to cross a bridge. They all begin on the same side. It is night and they have only one flashlight with them. At most two men can cross the bridge at a time and any party who crosses, either one or two people, must have the flashlight with them. The flashlight must be walked back and forth: it cannot be thrown, etc. Each man walks at a different speed. A pair must walk together at the speed of the slower man. Man 1 needs 1 minute to cross the bridge, man 2 needs 2 minutes, man 3 needs 5 minutes, and man 4 needs 10 minutes. For example, if man 1 and man 3 walk across together, they need 5 minutes.

    How can all four men cross the bridge in 17 minutes?

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    SherlockHolmes Expert Logic Puzzles.
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  • Century’s final day riddle

    Assuming year 1 started on Sunday, it can be shown that only some days are possible as a century’s final day. What are these days?

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    SherlockHolmes Expert Logic Puzzles.
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  • Money in book riddle

    There is a rich man living with two other people his butler and his maid. One day the rich man is sitting at his desk counting his money, preparing to deposit it at the bank. When he is done he goes to the bank, but when he arrives, he realises he left a $100 dollar bill on the desk. So he quickly called the house and told the butler that he forgot the $100 bill on the desk, and he will come home now to pick it up. When he arrived home he asked the butler what he did with the bill, the butler said he put it under the green book on the desk. When the rich man looked under the book, it wasn’t there, so he asked the maid if she saw it. She said she saw the $100 bill when she was dusting and put it between pages 67 and 68 of the green book. Right then and there the rich man called the police, and knew who stole it, even before the rich man checked inside the book to see if the $100 bill was there. How did he know?

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    SherlockHolmes Expert Logic Puzzles.
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  • Aliens in space riddle

    There are three Federation Officers assigned to take three hostile aliens to “Peace Talks” on another planet. However, they must follow the following rules:

    They have only one small space ship.
    Only two individuals can ride in the space ship each time.
    All Federation Officers can pilot the space ship, but only one alien can pilot the ship.
    If at any time there are both Federation Officers and aliens on a planet, then there must always be more (or the same number of) Federation Officers than aliens on that planet. This is because if there are more aliens than Federation Officers, then the aliens will kill the Federation Officers. Count any individual in the space ship when it is on one planet as being on that planet.
    The one space ship is the only means of transportation. There is no other way to get to the “Peace Talks”. No one can exit the space ship while it is in flight.
    To start off, all the Federation Officers and aliens are on the same planet.

    Can all Federation Officers and aliens get to the other planet alive, and if so: how?

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    SherlockHolmes Expert Logic Puzzles.
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  • Jenny’s boxes nriddle

    Jenny has boxes in three sizes: large, standard, and small. She puts 11 large boxes on a table. She leaves some of these boxes empty, and in all the other boxes, she puts 8 standard boxes. She leaves some of these standard boxes empty, and in all the other standard boxes, she puts 8 (empty) small boxes. Now, 102 of all the boxes on the table are empty.

    The question: How many boxes has Jenny used in total?

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    SherlockHolmes Expert Logic Puzzles.
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  • Fun with fuse riddle

    Assume that you have a number of long fuses, of which you only know that they burn for exactly one hour after you lighted them at one end. However, you do not know whether they burn with constant speed, so the first half of the fuse can be burnt in only ten minutes while the rest takes the other fifty minutes to burn completely. Also, assume that you have a lighter.

    How can you measure exactly three quarters of an hour with these fuses?

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    SherlockHolmes Expert Logic Puzzles.
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