# 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

Explanation:

S.I. = 500

r = 5%

t = 2 years

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

Apply formula; Principal = Principal = = Rs. 5000

Now we have to find the Amount;

Apply formula; Amount = Amount = 5000  = 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

Explanation:

Principal = Rs. 10000

r = 10%

C.I. = Rs. 2100 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 %, what is the sum?

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

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 = X We have;

X = Rs. 200

t = 2 years

r = 12 Therefore, Sum = 200 = 200 * = 200 * * = 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

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 = We have;

X = Rs. 200

r = 10%
Therefore, sum =  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

Explanation:

Let the sum = Rs. X

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

r = 4% for 6 months  Compound Interest Aptitude Test Paper 1
Compound Interest Concept   