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savit loves solving puzzles at PuzzleFry.com. I am proud PuzzleFry member and like my time invested in solving brain teasers.
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separate out 10 coins randomly lets say that it has x heads so it must have 10-x tails .
As there are 10 tails total the remaining 10 coins will have
10-(10-x) = x tails
and similary they will have 10-x heads .
now flip this 2nd pile ,all tails turn to heads and heads to tail so this pile has
x heads and 10-x tails , just like the first pile- 45828 views
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