Answer: (B) Rs 12100 Explanation: We have, A = (X/(1 + R/100)) + (X/(1 + R/100)²), Where A = amount, X = Annual installment, R = Rate of interest

Q. 65 If the rate of interest be 4% per annum for first year, 5% per annum for second year and 6% per annum for third year, then the compound interest of Rs 10000 for 3 years will be

Q. 66 The compound interest on a certain sum for 2 yr at 10% per annum is Rs 525. The simple interest on the same sum for double the time at half the rate per cent per annum is

Q. 67 A man borrowed some money from a private organization at 5% simple interest per annum. He lends 50% of this money to another person at 10% compound interest per annum and thereby the man made a profit of Rs 3205 in 4 years. How much did the man borrow?

Q. 72 If the difference between the compound interest and simple interest on a sum at 5% rate of interest per annum for three years is Rs 36.60, then the sum is

Q. 73 If the difference between the compound interest, compounded every six months and the simple interest on a certain sum of money at the rate of 12% per annum for one year is Rs 36, the sum is

Q. 75 A sum of money at compound interest will amount to Rs 650 at the end of the first year and Rs 676 at the end of the second year. The amount of money is

Q. 76 An amount of money appreciates to Rs 7000 after 4 years and to Rs 10000 after 8 years at a certain compound interest compounded annually. The initial amount of money was

Q. 77 An amount of Rs 16820 is divided between two brothers of age 27 years and 25 years. They invested their money at 5% per annum compound interest in such a way that both will receive equal money at the age of 40 years. The share of elder brother is

Q. 78 A sum of Rs 210 was taken as a loan. This is to be paid back in two equal instalments. If the rate of interest be 10% compounded annually, then the value of each instalment is

Q. 79 Kamal took Rs 6800 as a loan which along with interest is to be repaid in two equal annual instalments. If the rate of interest is 12(1/2)%, which is compounded annually, then the value of each instalment is

Q. 80 A man buys a scooter on making a cash down payment of Rs 16224 and promises to pay two more yearly instalments of an equivalent amount in the next two years. If the rate of interest is 4% per annum, compounded yearly, the cash value of the scooter is

Answer: (B) Rs 46824 Explanation: Let the principal for the first year = X, and the principal for the second year = Y Now, 16224 = X(1 + 4/100); X= 15600 And, 16224 = Y(1 + 4/100)², Y = 15000 Cash value of the scooter = (16224 + 15600 + 15000) = 46, 824