Incorrect Hotel Payments
A few minutes later, the desk clerk realizes that the room only costs $25, so she gives the bellboy $5 to return to the three guests. Seeing that $5 could not be divided evenly among the guests, the bellboy gave each guest $1 and kept $2 for himself.
It now seems that each guest has paid $9 for the room (that makes $27), and the bellboy has $2, for a total of $29.
Where is the missing dollar?