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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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