Where Did the Dollar Go ? Puzzle

The Puzzle:

Where Did the Dollar Go ?
Three friends have a nice meal together, and the bill is $25

The three friends pay $10 each, which the waiter gives to the Cashier

The Cashier hands back $5 to the Waiter

But the Waiter can't split $5 three ways, so he gives the friends one dollar each and keeps 2 dollars as a tip.

They all paid $10 and got $1 back. $10-$1 = $9

There were three of them 3 X $9 = $27

If they paid $27 and the waiter kept $2: $27+$2=$29

Where did the other dollar go? $30 - $1 = $29
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