Blind Money-Changers

Take as many coins of different value as possible. Give them to 2 players so that each of them has one and the same sum. Both players are blindfolded. One player gives a coin to the other. He/she must change it. Then they exchange the roles. They exchange the roles again and again. All the time the players check up the work of each other. In a fixed number of leads the game is over. The players move away their fillets and count the money they have. If both players have the same sums they had before the game started, both of them are winners. Otherwise both players loose the game.

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