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Three guys check into a hotel room. They get to the register to pay and the cashier says okay that's $30. So each guy paid $10 and they went up to their room. A couple minutes later the cashier realizes he charged too much so he sends the bellboy up to the room with $5. On his way up he decides to keep $2 for himself. So he gave each guy back a dollar. Now each guy has paid $9. $9x3=$27. plus the $2 the bell boy has is $29. What happened to the 30Th dollar?
