Three men went to a motel. The man behind the desk said the room is $30, so each man put up $10 each and went to the room. A little while later he realized the room was only $25, so he sent the bellhop back to the three guys room with $5. On the way to the room the bellhop couldn't figure how to split the $5 between the three guys so he just gave each one of them $1 and he kept the other $2. That left the three guys paying $9 each for the room. 3x9=27 + the 2 that the bellhop kept = $29. Where's the other dollar?