Question

TOUGHEST MATH

I have $ 500
SPEND
200 -- -- 300
150 --- 150
90 ------ 60
60 -----O
$ 500 $ 510
Where did this extra $10 come from ?

Answer 1

Probably something that costed $10

Answer 2

No where

Explanation:

You can't sum up all you past balances and expect to get your original amount :(