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August 27, 2011

Rope Puzzle - Rajeev is trapped !!!

Rajeev is trapped atop a building 200m high. He has with him a rope
150m long. There is a hook at the top where he stands. Looking
down, he notices that midway between him and the ground,at a
height of 100m, there is a ledge with another hook. In his pocket
lies a Swiss knife.

How might he be able to come down using the rope, the two hooks
and the Swiss knife?

August 11, 2011

A revolver with 2 bullets

You have been taken hostage by terrorists. Terrorist has a revolver with 6 empty chambers. He now loads the revolver with 2 bullets in front of you. These two bullets are kept next to each other (contiguously) in the 2 adjacent chambers, the terrorist now spins the barrel so that now you don't know what is location of bullets in chamber. He keep the revolver against your head and pulls the trigger. But its lucky day for you. It was the empty chamber. Now terrorist gives a slight chance to get free. He gives you a choice whether he should spin the barrel first then pull the trigger again.. or should just simply pull the trigger again ? If you get lucky again, terrorists will let you go..otherwise ..!!!

So what would you prefer ? Would you want him to spin the barrel first then shoot or just shoot without spinning the barrel ?

August 6, 2011

Inverted Cards

A blind man was handed a deck of 52 cards with exactly 10 cards
facing up. How can he divide it into two piles, each of which
having the same number of cards facing up?