So, three men pay for one hotel room which costs $30 each paying $10. Hours later the clerk realized he made a mistake and found out that the hotel room only costed $25, so he sent a bellboy up to the room with $5 to give to the three men. The bellboy realizes that you can't divide $5 evenly among three people, so he takes $2 for himself, tells them it was a tip, and gives each of the men $1. Later on, the men were balancing their budget and recording what they spent for that day. Their notes read that each man paid $10 at the beginning for a thirty dollar hotel room, but got a dollar back, so basically, it would be as if they each paid $9. Nine times three is twenty-seven and the bellboy has $2 for the tip. collectively, that would make $29. Where did the other dollar go?