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Puzzle Archives :: Interview Puzzles

 Interview Puzzles Practice Set 1

  • Question :: 1

    Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?


    No Best Answer on this question yet!

    Asked In : Accenture

  • Question :: 2

    How many steps are required to break an m x n bar of chocolate into 1 x 1 pieces? We may break an existing piece of chocolate horizontally or vertically. Stacking of two or more pieces is not allowed. 

                             


    Answer:

     We need mn - 1 steps. By breaking an existing piece horizontally or vertically, we merely increase the total number of pieces by one. Starting from 1 piece, we need mn - 1 steps to get to mn pieces.

    Another way to reach the same conclusion is to focus on "bottom left corners of squares": Keep the chocolate rectangle in front of you and start drawing lines corresponding to cuts. Each cut "exposes" one new bottom left corner of some square. Initially, only one square's bottom left corner is exposed. In the end, all mn squares have their bottom left corners exposed.                  

     

    Not Yet Asked in Any of the Companies

  • Question :: 3

    There are 100 doors, all closed. In a nearby cage are 100 monkeys.

     The first monkey is let out and runs along the doors opening every one. The second monkey is then let out and runs along the doors closing the 2nd, 4th, 6th,... all the even-numbered doors. The third monkey is let out. He attends only to the 3rd, 6th, 9th,... doors (every third door, in other words), closing any that is open and opening any that is closed, and so on. After all 100 monkeys have done their work in this way, what state are the doors in after the last pass, which doors are left open and which are closed?


    No Best Answer on this question yet!

    Asked In : Cavium Networks

  • Question :: 4

    There are n students in a class, each in possession of a different personality attribute. As they are new in the school, so they want to know about each other. To help the students, the teacher decides to conduct an activity. The rule for the activity is that the students will share the personality attributes of each other through a series of bilateral conversations (e.g., via a telephone). Assume that in every conversation both parties exchange all the personality attributes they know at the time. What is the minimum number of conversations they need to guarantee that everyone of them gets all the personality attributes?


    No Best Answer on this question yet!

    Not Yet Asked in Any of the Companies

  • Question :: 5

    There are two gates. One goes to hell and the other goes to heaven. The gatekeeper asks a puzzle to Sahil in order to decide which gate he should open for him. Obviously if Sahil answers the puzzle correct , the gate to heaven will be opened else the gate to hell. According to the problem Sahil is given n consecutive integers from 1 to n ,which are written in a row. He has to put signs “+” and “-” in front of them so that the expression obtained is equal to 0 or, if the task is impossible to do,then Sahil should tell the gatekeeper “No solution exists for the given problem “.The gatekeeper expects Sahil to find his answer in minimum time using an efficient approach rather than examining all possible ways to place the signs. Sahil comes to you considering you as his friend. Would you help him out to get to the solution ?


    No Best Answer on this question yet!

    Asked In : Sapient

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.