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#1 elochai



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Posted 23 March 2008 - 08:08 AM

A man finds himself in a room with two doors. He has to exit through one of those doors, one door will lead to freedom and the other leads to his death. At each door there is a guard. One of the guards will always lie and the other one will always tell the truth. The man does not know who lies and who tells the truth. He is allowed to ask one of the guards only one question. Assuming that the man wants to survive by exiting through the door that leads to his freedom, what is the question he must ask in order to be certain that he will walk out the correct door?
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Edited by elochai, 23 March 2008 - 08:08 AM.

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#2 rookie1ja


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Posted 23 March 2008 - 11:42 AM

this is one of my favorites ... it is also the most repeated puzzle on this forum - still coming in new variations (stories) B)) ... long discussion can be found in the thread entitled Honestants and Swindlecants III.

looking forward to new puzzles ... this topic is locked
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