Question

i have 50 rupees, from this
i spent 20 rs balance= 30,
spent=15 balance=15
spent=9 balance=6
spent=6 balance=0
now , i have done total spent 50 and balance total is 51, how?

Answer 1

spent - balance
20     -  30
15     -  15
9      -   6
6      -   0
50    -  51
therefore balance = 51 rupees