Three men check in at a motel. The rate is $30 so they split it evenly $10 ea. Later, the manager remembers the rate is only $25 so he sends a bellboy up to their room with the difference. However, the bellboy realizes he can't evenly split the $5 three ways so he keeps $2 and gives the men back $1 each. So $9x3=$27+$2(bellboy)=$29...where did the other $1 go!?