A. Rs. 16

B. Rs. 18

C. Rs. 20

D. Rs. 21

The compound interest on any sum at the rate of 5% lb two years is ?512.50. Find the sum.

The C.P. of an article is 40% of the S.P. The percent that the S.P is of C.P is:

On selling an item for 96 Rs a man gains 20%. In order to gain 35%. What will be the increase in the selling price?

If the S.P of Rs. 24 results in a 20% discount on list price. What S.P. would result in a 30% discount on list price?

A shopkeeper sold an article offering a discount of 5% and earned a profit of 23.5%. What would have been the percentage of profit earned if no discount had been offered?