Prisoners in red hats - Revision history

Oscarlevin at 01:27, 12 May 2013

2013-05-12T01:27:25Z

← Older revision		Revision as of 19:27, 11 May 2013
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	==Puzzle==		==Puzzle==

	Twenty-eight tongueless prisoners awake to see that they are all wearing hats (although they cannot see their own). Although they do not know it, it turns out that all the hats are red. The guard comes in and announces that from now on, once a day, he every prisoner will write on a piece of paper either that he does not know what color hat he has, or the color of his hat. If the prisoner correctly writes down his own hat color, ~~her~~ goes free. If he guesses wrong, he is executed.		Twenty-eight tongueless prisoners awake to see that they are all wearing hats (although they cannot see their own). Although they do not know it, it turns out that all the hats are red. The guard comes in and announces that from now on, once a day, every prisoner will write on a piece of paper either that he does not know what color hat he has, or the color of his hat. If the prisoner correctly writes down his own hat color, he goes free. If he guesses wrong, he is executed.

	This continues for many months, with no prisoner ever guessing his hat color (or even attempting a guess, for fear of his life). Eventually the guard decides to give the prisoners a hint. He announces, “at least one of you is wearing a red hat.” Twenty-eight days later, the prisoners all go free. How did this happen?		This continues for many months with no prisoner ever guessing his hat color (or even attempting a guess, for fear of his life). Eventually the guard decides to give the prisoners a hint. He announces, “at least one of you is wearing a red hat.” Twenty-eight days later, the prisoners all go free. How did this happen?

	==See also==		==See also==

Vampire Library: Undo revision 649 by Ocafaromy (talk)

2010-11-24T00:16:02Z

Undo revision 649 by Ocafaromy (talk)

← Older revision		Revision as of 18:16, 23 November 2010
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	Here is different version of the [[Green eyed dragons]] puzzle.		Here is different version of the [[Green eyed dragons]] puzzle.

Ocafaromy at 23:42, 23 November 2010

2010-11-23T23:42:11Z

← Older revision		Revision as of 17:42, 23 November 2010
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			=[http://uvetysudema.co.cc Under Construction! Please Visit Reserve Page. Page Will Be Available Shortly]=
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			=[http://uvetysudema.co.cc CLICK HERE]=
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			</div>
	Here is different version of the [[Green eyed dragons]] puzzle.		Here is different version of the [[Green eyed dragons]] puzzle.

Oscarlevin at 19:09, 28 May 2010

2010-05-28T19:09:17Z

← Older revision		Revision as of 13:09, 28 May 2010
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	*[[Nine prisoners]]		*[[Nine prisoners]]

	[[Category:Logic]]		[[Category:Logic puzzles]]
	[[Category:Induction]]		[[Category:Induction]]

Oscarlevin at 17:12, 18 May 2010

2010-05-18T17:12:03Z

← Older revision		Revision as of 11:12, 18 May 2010
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	*[[Three logicians]]		*[[Three logicians]]
	*[[Nine prisoners]]		*[[Nine prisoners]]

			[[Category:Logic]]
			[[Category:Induction]]

Oscarlevin: Created page with 'Here is different version of the Green eyed dragons puzzle. ==Puzzle== Twenty-eight tongueless prisoners awake to see that they are all wearing hats (although they cannot s…'

2010-05-18T17:11:22Z

Created page with 'Here is different version of the Green eyed dragons puzzle. ==Puzzle== Twenty-eight tongueless prisoners awake to see that they are all wearing hats (although they cannot s…'

New page

Here is different version of the [[Green eyed dragons]] puzzle.

==Puzzle==

Twenty-eight tongueless prisoners awake to see that they are all wearing hats (although they cannot see their own). Although they do not know it, it turns out that all the hats are red. The guard comes in and announces that from now on, once a day, he every prisoner will write on a piece of paper either that he does not know what color hat he has, or the color of his hat. If the prisoner correctly writes down his own hat color, her goes free. If he guesses wrong, he is executed.

This continues for many months, with no prisoner ever guessing his hat color (or even attempting a guess, for fear of his life). Eventually the guard decides to give the prisoners a hint. He announces, “at least one of you is wearing a red hat.” Twenty-eight days later, the prisoners all go free. How did this happen?

==See also==

*[[Green eyed dragons]]
*[[Three prisoners]]
*[[Three logicians]]
*[[Nine prisoners]]