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Pastimes : Laughter is the Best Medicine - Tell us a joke -- Ignore unavailable to you. Want to Upgrade?

To: Jeffrey S. Mitchell who wrote (61637)	12/9/2022 4:16:54 PM
From: George W Bush	Read Replies (2) \| Respond to of 62549

Turn them all over so that none has a colored side up ?

To: Jeffrey S. Mitchell who wrote (61637)	12/9/2022 6:00:38 PM
From: Sun Tzu	Read Replies (1) \| Respond to of 62549

Take 30 coins out and flip them. PS First time I've heard this puzzle and I didn't use math, but it makes intuitive sense.

To: Jeffrey S. Mitchell who wrote (61637)	12/9/2022 7:49:49 PM
From: Sun Tzu	Read Replies (2) \| Respond to of 62549

Four men in hats puzzle Question As shown in picture above there are 4 men looking forward. None of them can see back. There is a opaque wall between man number 3 and man 4 (1,2,3 cannot see pass the wall). Two of the men are wearing a black hat and two of them are wearing a white hat. Each man can see the color of the hat wore by the men in front of him. (1 can see 2,3 and 2 can see 3) but each person does not know the color of the hat he is wearing. Now one of the man needs to call out the color of his hat else they all die in 10 mins. Which man will callout the color of his hat correctly and why?