Possible Duplicate:
Riddle (simple arithmetic problem/illusion)
Three men go to a shop and take some food which is cost $25. Waiter came and gave them bill.
Each of them gave $10. So, waiter take total$10+$10+$10=$30.Waiter came back with$5. Three men took$1+$1+$1and they decide to gave rest $2 to waiter. Now if we calculate the above thing then it should look like this:Man A total spend $10 - $1 = $9 Man B total spend $10 - $1 = $9 Man C total spend $10 - $1 = $9 Three men Total = $27 and waiter take = $2 So , three men total + waiter = $27 + $2 = $29 !!!! Where is another Dollar gone! Can anybody please explain it for me please?