# Compound Interest

The Simple interest on a certain sum for 2 years at 10% per annum is Rs. 90. The corresponding compound interest is:
A.97
B.90
C.94.50
D.100

Manoj borrowed a certain sum from Anuj at a certain rate of simple interest for 2 years. He lent this sum to Rakesh at the same rate of interest compounded annually for the same period. At the end of two years, he received Rs. 4200 as compound interest but paid Rs. 4000 only as simple interest. Find the rate of interest?

A.10%

B.20%

C.25%

D.30%

If the difference between the simple interest and compound interests on some principal amount at 20% for 3 years is Rs. 48, then the principal amount is

A.636
B.650
C.375
D.400

What sum invested for 2 years at 12% compounded annually will grow to Rs. 4390.40…..

A.4000
B.3875
C.3800
D.3500