An adventurer found a locked treasure chest in a dungeon. He tracked down three brothers (each either a Liar or a Knight) one of whom has the key to open the chest.

Each made a statement:

A: I have the key to the chest.

B: I don't have the key to the chest.

C: B Doesn't have the key.

The adventurer knows that at least one of the three is a Liar, and at least one - a Knight. Who has the key?

As B,C made same statement. They should be both liars or knights
If B,C are liars, turns A to be a liar too, but there is atleast 1 knight.
So, B,C are Knights and A is a liar. C has the key.

Posted by Praneeth on 2007-08-29 02:53:24