41. In how many years will a sum of Rs. 320 amount to Rs. 405 if interest is compounded at 12.5% per annum?
42. A sum of Rs. 4,620 is to be paid back in 2 equal annual instalments. How much is each instalments (in Rs.) if the interest is compounded annually at 10% per annum?
43. A sum of Rs. 18,000 is lent at 10% p.a. compound interest, compounded annually. What is the difference between the compound interest for 3rd year and 4th year?
44. A loan is to be returned in two equal yearly instalments. If the rate of interest is 10% p.a., compounded annually, and each instalment if Rs. 5,808, then the total interest charged in this scheme is:
45. What is the amount (in Rs.) of a sum of Rs. 32,000 at 20% per annum for 9 months, compounded quarterly?
46. The compound interest on a sum of Rs. 5,500 at 15% p.a. for 2 years, when the interest is compounded 8 monthly is:
47. The compound interest (compounded annually) on a sum of money invested for three years yields Rs. 800 and Rs. 840 in four years. The annual percentage rate of interest is:
48. The compound interest on a sum of Rs. 20,000 at 15% p.a., for $$2\frac{2}{3}$$ years, interest compounded yearly is:
49. The difference between the compound interest on a sum of Rs. 8,000 for 1 year at the rate of 10% per annum, interest compounded yearly and half yearly is:
50. If the difference between the compound interest and simple at 17% on a sum money for 2 years (compounded annually) is Rs. 433.50, then the compounded
interest (in Rs.) is:
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