1) If the simple interest on a sum of money for 2 years at 5% per annum is Rs. 50. What is the compound interest on the same sum at the same rate and for the same time ? A) Rs. 60 B) Rs. 54.25 C) Rs. 52 D) Rs. 51.25 E) Rs. 53.25 Answer: Option DExplanation:Difference in C.I. and S.I. =Rate×S.I.2×100 =5×502×100 =1.25 C.I. =50+1.25 = Rs. 51.25.