Where is $1 gone!

Question

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. <pre>Each of them gave $10. So, waiter take total

$10+$10+$10=$30.

Waiter came back with

$5</pre>. Three men took <pre>$1+$1+$1

and they decide to gave rest $2 to waiter. Now if we calculate the above thing then it should look like this: </p> <pre> 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?

Answer 1

The wrong numbers are added and subtracted. It should be:

The men pay 30

The waiter gives 3 back, so the men paid 27 and the waiter got 27

The food was 25, so the waiter can keep 2 dollars.

Answer 2

The $\$27$ includes the $\$25$ they paid for food, plus the $\$2$ to the waiter. They pocketed the other three dollars.