1.  What will be the difference between simple and compound interest @ 10% per annum on a sum of ₹ 1000 after 4 year?
A. ₹ 31
B. ₹ 32.10
C. ₹ 40.40
D. ₹ 64.10
E. None of these

Answer: Option D

Explanation:

S.I. = ₹ 1000 x 10 x 4 = ₹ 400.
100

C.I. = ₹ 1000 x 1 + 10 4 - 1000 = ₹ 464.10
100

∴ Difference = ₹ (464.14 - 400) = ₹ 64.10