What will be the difference between simple and compound interest @ 10% per annum on the sum of Rs 1000 after 4 years	Choices:
A) rs 62.10	B) rs 63.10	C) rs 64.10	D) rs 65.10	E) none of these

Rationale: explanation : s . i . = 1000 ∗ 10 ∗ 4 / 100 = 400 c . i . = [ 1000 ( 1 + 10 / 100 ) 4 − 1000 ] = 464.10 so difference between simple interest and compound interest will be 464.10 - 400 = 64.10 option c
Answer: C