Compound Interest (Railway Maths) (Part – I)

Total Questions: 50

1. If a sum of money doubles itself in 10 years at compound interest, then in how many years will it become 16 times of itself at the same rate ? [Group D 23/08/2022 (Morning) ]

Correct Answer: (c) 40
Solution:

2. Find the answer of given question? [Group D 30/08/2022 (Afternoon) ]

Correct Answer: (b) ₹2,037.50
Solution:

3. A certain sum amounts to ₹98,494 at the rate of 15% per annum in 2 years, interest compounded 8-monthly. What will be the amount payable (in ₹) on the same sum at the same rate and at the same time, if the interest is compounded yearly ? [Group D 05/09/2022 (Evening) ]

Correct Answer: (a) 97,865
Solution:

4. Find the answer of given question? [Group D 06/09/2022 (Afternoon) ]

Correct Answer: (a) 38,000
Solution:

5. Rajani borrowed an amount of 11,550 at an interest rate of 10% per annum, compounded annually. She repaid the entire amount with interest in two equal installments, the installments being paid at the end of the first and the second years from the date of borrowing. What is the value of each installment, if interest is computed on reducing balance ? [Group D 12/09/2022 (Afternoon) ]

Correct Answer: (c) ₹6,655
Solution:

6. Find the answer of given question? [Group D 22/09/2022 (Morning) ]

Correct Answer: (a) 10%
Solution:

7. A person borrows ₹20,000 at 25% compound interest per year, compounded annually. At the end of every year, he pays ₹2,500 as part payment. How much does he still owe after two such installments? [Group D 30/09/2022 (Morning)]

Correct Answer: (a) ₹25,625
Solution:

8. If the interest earned during the 2nd year on a certain sum is ₹2,761, and the rate of interest is 10% per annum compounded annually, then the sum is: [Group D 06/10/2022 (Afternoon)]

Correct Answer: (d) ₹25,100
Solution:

9. A bank offers 7.5% compound interest per annum calculated on a half-yearly basis. A customer deposits ₹3,600 each on 1 January and 1 July of a year. At the end of the year, the amount he would have gained by way of interest is _________. [Give your answer correct to 2 decimal places.] [Group D 07/10/2022 (Afternoon)]

Correct Answer: (b) ₹410.06
Solution:

10. A sum of ₹7800 amounts to ₹10381.80 at x% p.a. In 2 years when the interest is compounded- 8monthly. What will be the compound interest on the same sum at (x + 5)% p.a. In one year, if the interest is compounded half yearly ? [NTPC CBT II Level 6 (09/05/2022) Shift 2 ]

Correct Answer: (b) ₹1638
Solution: