Thursday, July 21, 2011

Every man in a village of 100 married couples has cheated on his wife…

Every wife in the village instantly knows when a man other than her husband has cheated, but does not know when her own husband has. The village has a law that does not allow for adultery. Any wife who can prove that her husband is unfaithful must kill him that very day. The women of the village would never disobey this law. One day, the queen of the village visits and announces that at least one husband has been unfaithful. What happens?

Solution: clearly if there > 1 man cheating, but they must be all cheating otherwise they would have been discovered.

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