13th Jun
3

Logic Problem – The Double Jeopardy Doors

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?

By Sandeep Mundra quiz 3 Comments » Read More
  • Jayesh Karathiya

    Ask one robot what the other robot would say, if it was asked which door was safe. Then go through the other door.

  • Ashish Sajwan

    ask any of the robot (say robot 1) the question “what the other robot (robot 2) will answer if asked about the safer door ?” and choose the door other than what you hear in reply from the robot (robot 1).
    just negate the answer from robot 1
    if robot 1 says truth always, that means robot 1 is saying truth about robot 2 (which always says false) and negating this will make you right (true)
    and if robot 1 says false always then it means the reply you just heard is actually the negation of what robot 2 have to say or would have said if asked directly. now negation of this reply again put you at right door.

    • http://www.facebook.com/skm1803 Sandeep Mundra

      bingo! you got the freedom door.