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?

A cannot have the key, because if he had the key, then all three would be telling the truth. if B had the key, then all three wouldn't be telling the truth, and that leaves the answer to be adventurer number 3

Posted by Jonathan on 2003-03-26 06:52:41