Three men went to a motel.  The man behind the desk said the room is $30, so each man put up $10 and went to the room.  A little while later the man behind the desk realized the room was only $25, so he sent the bellhop back to the 3 guys' room with $5.  On the way to the room the bellhop couldn't figure out how to split the $5 between the 3 men, so he just gave each one of them $1 and he kept the other $2.

This meant that the 3 men paid $9 each for the room for a total of $27.  Add the $2 that the bellhop kept =  $29.

Where's the other dollar?