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Aptitude Compound Interest Test Paper 2


6) The simple interest on a certain sum of money at rate of interest 5% per annum for 2 years is Rs. 500. What is the compound interest on the same sum for the same period and at the same rate of interest?

  1. Rs.412.5
  2. Rs.400
  3. Rs.500
  4. Rs.512.5

The Correct answer is (D)

Explanation:

S.I. = 500

r = 5%

t = 2 years

Before finding C.I. we have to find the sum or principal;

Apply formula; Principal = Apti Compound interest37
Principal = Apti Compound interest38= Rs. 5000

Now we have to find the Amount;

Apply formula; Amount =Apti Compound interest39

Amount = 5000 Apti Compound interest

Apti Compound interest

= 5000 * 1.05 * 1.05 = Rs. 5512.5

C.I. = Amount - Principal

C.I. = 5512.5 - 5000 = Rs. 512.5 (Option D)


7) In how many years the compound interest on Rs. 10000 at the rate of 10% will be Rs. 2100 ?

  1. 1.5 years
  2. 2 years
  3. 2.5 years
  4. 3 years

The Correct answer is (B)

Explanation:

Principal = Rs. 10000

r = 10%

C.I. = Rs. 2100

Apti Compound interest


8) The difference between Simple Interest and Compound Interest on a certain sum of money for 2 years is Rs.200. If the rate of interest is 12 Apti Compound interest43%, what is the sum?

  1. Rs. 11800
  2. Rs. 12000
  3. Rs. 12800
  4. Rs. 13000

The Correct answer is (C)

Explanation:

If the difference between the C.I. and S.I. on a certain sum of money for 2 years at rate of interest r % is Rs. X, then the sum is given by;

Sum = XApti Compound interest

We have;

X = Rs. 200

t = 2 years

r = 12 Apti Compound interest
Therefore, Sum = 200 Apti Compound interest

= 200 * Apti Compound interest

= 200 * Apti Compound interest * Apti Compound interest

= 200 * 64

= Rs. 12800 (Option C)


9) If the difference between Simple Interest and Compound Interest on a sum of money for 3 years is Rs. 200 and the rate of interest is 10%, what is the sum?

  1. Rs. 6451.6
  2. Rs. 6351.6
  3. Rs. 6251.6
  4. Rs. 6151.6

The Correct answer is (A)

Explanation:

If the difference between C.I. and S.I. on a certain sum for 3 years at rate of interest r% is Rs. X, then the sum is given by;

Sum = Apti Compound interest

We have;

X = Rs. 200

r = 10%
Therefore, sum = Apti Compound interest

Apti Compound interest

10) The difference between simple interest and compound interest on a sum of money for 1 year at 4% per 6 months is 4, what is the sum?

  1. Rs. 2100
  2. Rs. 2300
  3. Rs. 2500
  4. Rs. 3000

The Correct answer is (C)

Explanation:

Let the sum = Rs. X

t = 1 year = 2 half years (6 months)

r = 4% for 6 months

Apti Compound interest48

Apti Compound interest48


Compound Interest Aptitude Test Paper 1
Compound Interest Concept

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