another one.
3 guys check into a hotel costs $30, meaning each pays $10.
as it's promotional period, the hotel offers $5 discount.
the manager den tells his staff to refund the 3 $5.
the staff feels that it's difficult to divide $5 among the 3, ka po
$2.
thus, the staff returns each $1.
so, it means that the 3 pays $9($10 - $1) each.
but, 3 x $9 = $27
$27 + $2 (from the staff) = $29
so where's the missing 1 dollar?
