Brain Teaser - The Missing Dollar

Three friends check into a hotel room that costs $30. They each contribute $10, handing $30 to the hotel clerk. Later, the hotel clerk realizes there was a mistake and the room only cost $25. The hotel clerk gives $5 to the bellboy and asks him to return it to the guests. The bellboy, however, decides to keep $2 for himself and gives $1 back to each guest.

Now, each guest has paid $9 (a total of $27), and the bellboy has kept $2, which adds up to $29. What happened to the missing dollar?

Reveal Answer ▼