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Unread 18-10-2005, 15:49
KenWittlief KenWittlief is offline
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Re: coins in a dark room

I think I reasoned it out, I had the right idea on my first post, but the wrong number

the original pile has 32 heads up, so you take 32 from the pile and flip them over. That is your second pile.

If you grabbed all 32 heads then there are no heads left in either pile

if you grabbed 18 heads and 18 tales, then you left 18 heads in the first pile, and when you flip the second pile you have 18 heads in both piles

if you grabbed 19 heads and 17 tales, then you left 17 heads in the first pile, and when you flip the second you have 17 heads and 19 tails

it works for all combinations

but I like the pocket answer better :^)

Last edited by KenWittlief : 18-10-2005 at 21:08.
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