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Asking The Right Question.... Logic It Out

A prisoner who has been condemmed to death is given a last chance to escape his sentence. He is shown two doors each with its own guard. He is told that one door leads to the gallows and one door to freedom. He is being allowed to choose which door to go through.

The warder tells the prisoner that he may ask one question of one of the guards, to help him decide which door to choose. One guard ONLY tells lies and the other ONLY tells the truth but the prisoner does not know which one is which.

Assuming that the prisoner does indeed want his freedom, what question should he ask to be certain of which door to pick?

There may be more than one answer to this, but I have only thought of one........mind you I lost interest in thinking about it then!

Don't scroll down any further or you will see the answer in the comments section. Someone has worked it out.
keymallard keymallard 46-50, M 1 Response Apr 28, 2012

Your Response


Ask one door guard what the other one would say, ask "would he tell me that this door leads to freedom?" if his answer "yes" you now know that the other door leads to freedom.

That's the one I thought of.