Three guys are in a hotel room and they decide to order a pizza. The total comes to $30 so they split the cost and pay $10 each when the delivery boy arrives (no tip mind you).
The pizza guy gets back to the restaurant and is told "Sorry we made a mistake - the price should have been only $25 - so please take $5 back to the customer"
On the way back the disgruntled pizza boy pockets $2 for himself (after all those cheap guys didn't tip him) and returns $3 to the men who split it evenly.
The question now is "How much did each man pay for the pizza?"
Most people remember that the men each paid $10 originally... AND that by splitting the retruned $3 they should have each gotten $1 back.
$10 - $1 = $9
$9 each is of course the correct answer. Here's the wierd part though that will leave you (and me) scratching your head:
$9 X 3 (men) = $27
$27 + $2 (the money the pizza boy stole) = $29
So where did the other $1 go???
Will give the answer in a couple of days unless someone else figures it out first 
Brain teaser.... 
