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Puzzle Archives :: Interview Puzzles

 Interview Puzzles Practice Set 4

  • Question :: 1

    There are 100 doors they are all closed.

    A Person walks through these 100 doors 100 times. Each time he toggles some of the doors. ( Toggles - close if open, open if close )

    In the first walk, he will toggle all the doors.

    In the second walk, he will toggle every second door, i.e., 2nd, 4th, 6th, 8th and so on

    In the third walk, he will toggle every third door, i.e. 3rd, 6th, 9th and so on,

    So after 100th Walk, what all door will be open?


    No Best Answer on this question yet!

    Asked In :

    Alcatel-Lucent 

  • Question :: 2

    The Monty Hall Puzzle

    You are the contestant on a Game Show. There are 3 doors – say A,B and C – and behind one door is the prize of a million dollars. The prize is randomly placed and the probability of finding the prize behind any door is 1/3.

    You get to pick one door and if you’ve picked the right door, you win the prize.

    There’s a catch. After you’ve chosen a door, the game show host will not immediately open that particular door. The host will open another door that you did not pick and which he knows does not contain the prize. Suppose you had picked door A, and the prize is behind door B, the host will open door C and let you know that there is nothing being door C.

    At this point, you will be given a choice: Do you want to stick with your original choice (door A in the example above) or do you want to choose the other unopened door (door B in this example)?

    Would you switch your choice?


    No Best Answer on this question yet!

    Asked In :

    Infosys 

  • Question :: 3

    The Ultimate Balance Puzzle

    There are 12 balls, one of which is different in weight (can be heavier or lighter)

    Find the oddball using less than 3 weightings of the balance.


    No Best Answer on this question yet!

    Asked In :

    Wipro 

  • Question :: 4

    Missionaries and Cannibals

    Three missionaries and three cannibals must cross a river. There is a single boat which can carry a maximum of two people and there must be at least one person on board (the boat cannot cross by itself).

    On either bank, if there are missionaries present, the count of missionaries must be equal or greater than the count of cannibals, else the cannibals would eat them.


    No Best Answer on this question yet!

    Asked In :

    Wipro 

  • Question :: 5

    25 horses 5 track Puzzle

    There are 25 horses out of which you need to find the fastest 3 horses. The race ground consists of 5 tracks that mean you can run only 5 horses at a time. If you don't have a stopwatch. What is the minimum number of races required to find the fastest 3 horses?


    No Best Answer on this question yet!

    Asked In :

    Accenture 

Puzzle test enable the companies to check the Logical skills of a candidate. Check out these Puzzle topics with answers for the interview! You can choose a topic and speak up your mind through a Gmail type editor.