Wednesday, October 21 · Logic Riddles
Treasure is hidden behind one of three doors, and only one of the three signs is true. Door 1: “The treasure is not here.” Door 2: “The treasure is not here.” Door 3: “The treasure is behind door 2.” Where is the treasure?
Hint
Put the treasure behind each door in turn and count the true signs.
Answer
Behind door 1. Then sign 1 is false, sign 2 is true and sign 3 is false: exactly one true sign. Behind door 2, signs 1 and 3 would both be true; behind door 3, signs 1 and 2 would both be true.