Thursday, October 25, 2012

Puzzle 7: Figure out the liar

Puzzle 7: There is a T point and you are coming from one other side. You have to go towards TrueValley as there is no sign board for the same at T-point. There is one person standing at T-point whom you are allowed to ask only question. But the answer depends on following case:
a)      Person from TrueValley always say truth.
b)      Person from FalseValley always say false.
c)       You don’t know the person standing is from which valley.
What will be your question to find your way?
Solution: Invite him and say you will drop him at his home. There can be two cases only.
a)      Person is from TrueValley then he will take towards his home i.e. TrueValley which is your destination.
b)      Person is from FalseValley then he will take towards other route instead of his home which was FalseValley. As he is a lier so will never ever take you towards his home.

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