What is the compound interest paid on a sum of Rs.3500 for the period of 2 years at 10% per annum.	Answers:
A) 630  B) 735  C) 825  D) 600  E) none of these

Rationale: "solution = interest % for 1 st year = 10 interest % for 2 nd year = 10 + 10 % of 10 = 10 + 10 * 10 / 100 = 11 total % of interest = 10 + 11 = 21 total interest = 21 % 3500 = 3500 * ( 21 / 100 ) = 735 answer b"
Answer: B