3 guys go into a hotel. The manager charges 30$ for the room. They take the key and go to their room. The manager realizes he billed them the wrong price, so he asks an employee to return them 5$. On the way, the employee cannot figure how to split up 5$ evenly in 3, so he keeps 2$ and gives the guys back 1$ each.
Accounting says is balances. Math says it does not.
Accounting: 30$ - 2$ - 3$ = 25$. No money lost.
Math: Each guy receives 1$ back. So each paid 10 - 1 = 9$. The employee kept 2$. 3 guys * 9 $ = 27 $. Add the 2$ and you end up with 29$. NOW WHERE DID THE MISSING 1$ GO ???
(I don`t have the answer btw.)