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Compound Interest

Important Instructions
91.

How much money invested at compound interest will yield Rs. 6350.40 at the end of 3 years? For the first year the rate of interest is 5%; for second year it increases to 12% and for third year it decreases to 8%.

Answer: D

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92.

What will be the compound interest on a sum of Rs. 25,000 after 3 years at the rate of 12% p.a.?

Answer: C

Amount = [25000 * (1 + 12/100)⊃3;]

= 25000 * 28/25 * 28/25 * 28/25 = Rs. 35123.20

C.I. = (35123.20 - 25000) = Rs. 10123.20

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93.

The difference between simple and compound interest on Rs. 1200 for one year at 10% per annum reckoned half-yearly is?

Answer: B

S.I. = (1200 * 10 * 1)/100 = Rs. 120 

C.I. = [1200 * (1 + 5/100)⊃2; - 1200] = Rs. 123 Difference = (123 - 120) = Rs. 3.

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94.

Find out the C.I on Rs.5000 at 4% p.a. compound half-yearly for 1 1/2 years.

Answer: C

A = 5000(51/50)⊃3;

    = 5306.04

       5000

      -----------

      306.04

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95.

The principal that amounts to Rs. 4913 in 3 years at 6 1/4 % per annum C.I. compounded annually, is?

Answer: D

Principal = [4913 / (1 + 25/(4 * 100))⊃3;] 

= 4913 * 16/17 * 16/17 * 16/17 = Rs. 4096.

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96.

Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?

Answer: D

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97.

Sarang invested some money in HDFC at 3% rate of interest. What would be the corresponding simple interest if after 2 years, Sarang got Rs. 101.50 as compound interest?

Answer: C

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98.

The least number of complete years in which a sum of money put out at 20% compound interest will be more than doubled is:

Answer: B

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99.

The difference between simple and compound interest on a certain sum of money for 2 years at 4 percent per annum is Re.1. The sum of money is

Answer: B

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100.

Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is:

Answer: C

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