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  1. nick2014 added a question in New Logic/Math Puzzles   

    game theory ...tough
    Three explorers are getting kidnapped by an evil tribe deep in the jungle, and their life now depends on
    their ability to correctly answer the following challenge the evil tribe's chief has for them. The
    explorers are tied to three trees facing each other and are presented with the chief's 5 wives: 3
    brunettes, and 2 blondes. The three explorers are now blindfolded, and the chief picks three of his five
    wives to stand behind the trees the explorers are tied to, one behind each tree. The remaining two wives
    disappear from view.

    Then the blindfolds come off, and each explorer is able to see the two wives that are standing behind his two colleagues, but not the one behind himself.
    Each explorer now has up to 10 minutes time to think, after which each has to correctly answer what hair color the wife has that is standing behind him, or lose his life.

    When you, as one of the three explorers, gain your sight after the blindfold comes off, you see
    two brunettes standing behind your two colleagues. And now your life depends on figuring out who is behind you: a blonde or a brunette?

    This is not a trick question (e.g., they cannot talk or otherwise cheat), and it's not about probabilities. There is one--and only one--logical solution to this
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