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Riddles ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Hats There are 3 black hats and 2 white hats in a box. Three men (we call them A, B, & C) each reach into the box and place one of the hats on his own head. They cannot see what color hat they have chosen. The men are situated in a way that A can see the hats on B & C's heads, B can only see the hat on C's head and C cannot see any hats. When A is asked if he knows the color of the hat he is wearing, he says no. When B is asked if he knows the color of the hat he is wearing he says no. When C is asked if he knows the color of the hat he is wearing he says yes and he is correct. What color hat and how can he be sure? Solution: A must not see two white hats on B & C, or he would know his own must be black. So his answer establishes that at least one of the hats on B & C is black. If B saw that C was wearing a white hat, then B would know his own was black. Since B could not say that truthfully, then C must be wearing black and therefore answers correctly. |
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