I seriously don't get it. Help me ASAP.

Question

If i have 50 rupees.

        spent.           Remaining

          20.                 30

          15.                 15

           9.                   6

           6.                   0

Total.   50.                 51

why there is diffrence in total?

Answer 1

Totaling the amount spent gives 50 rupees, so you have none left.

 

What do you think is the sense of adding up the column of remainders??