2010-01-15, 08:40 PM
(This post was last modified: 2010-01-16, 03:44 PM by hyperhopper.)
no, you have 90 coins with heads facing up, 10 with tails facing up.
its dark and you cannot tell which are which.
hw can you put them into 2 piles, each having the same number of tails?
its dark and you cannot tell which are which.
hw can you put them into 2 piles, each having the same number of tails?