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 2 guesses, 3 hats (Posted on 2003-01-17)
When a person walks into a party he will be given one of 3 hats. Each hat is either yellow, red or blue. Every person does not know the colour of their own hat but he can see the colour of everyone else's.

At this point in the party everyone is seated in a circle and must guess the colour of their own hat. If they do they get 100 dollars.

Every person can make a guess of yellow, red or blue and nothing else. Every person gets two such guesses but these can be made in any order. (That is one need not make both his guesses one right after the other.)

In order to win with one of your two guesses you must say the colour of your own hat. How can every person guarantee themselves the money? (How can they have a 100% chance of guessing the colour of their hat correctly?)

 See The Solution Submitted by Alan Rating: 2.3158 (19 votes)

 Subject Author Date Reply to official solution john 2005-06-15 19:13:38 Solution Lewis 2003-07-22 09:27:31 no Viet 2003-07-11 10:43:58 re: 3 Hats E Woodford 2003-01-19 21:49:07 3 Hats Matt 2003-01-17 12:58:57 re: 3 Hats Cory Taylor 2003-01-17 07:08:34 3 Hats Edward Woodford 2003-01-17 04:11:04 re(2): 3 hats fwaff 2003-01-17 04:09:09 re: 3 hats friedlinguini 2003-01-17 03:33:05 3 hats John 2003-01-17 02:30:15

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