Simple Interest (Railway Maths) (Part – III)

Total Questions: 50

1. The difference between the simple interest recovered from two different sources on Rs 1200 for 3 years is Rs 10.80. The difference between the rates of interest is: [RRB NTPC 03/02/2021 (Morning) ]

Correct Answer: (c) 0.3%
Solution:

2. A person invested 2/3 of the capital at the rate of 6%, 1/5 at the rate of 10%, and the remainder at the rate of 15%. If his annual income is Rs. 600, the capital will be: [RRB NTPC 03/02/2021 (Morning)]

Correct Answer: (d) Rs. 7,500
Solution:

3. A woman borrowed some money on simple interest. After 4 years she returned 6/5 of money to the lender. What was the rate of interest? [RRB NTPC 09/02/2021 (Evening)]

Correct Answer: (b) 5% p.a.
Solution:

4. A sum of money lent at simple interest amounts to Rs. 720 after 2 years and to Rs. 1,020 after a further period of 5 years. What is the sum of money? [RRB NTPC 11/02/2021 (Morning)]

Correct Answer: (a) Rs. 600
Solution:

5. A sum of money doubles itself in 10 years. In how many years will it be triple at the same rate of simple interest? [RRB NTPC 12/02/2021 (Morning)]

Correct Answer: (a) 20
Solution:

6. What will be the simple interest on a sum of Rs. 2,000 for 4 years at a rate of 1 paisa per rupee per month? [RRB NTPC 15/02/2021 (Morning)]

Correct Answer: (a) Rs. 960
Solution:

7. A sum of money increases to Rs. 7,500 after 5 years and Rs. 9,200 after 7 years respectively at the same rate of simple interest. Find the approximate rate of interest per annum. [RRB NTPC 15/02/2021 (Evening)]

Correct Answer: (d) 26.2%
Solution:

8. A sum of money invested at x% simple interest per annum amounts to Rs. 2,368 in 6 years and to Rs. 3,008 in 11 years. Find the value of x. [RRB NTPC 17/02/2021 (Evening)]

Correct Answer: (c) 8
Solution:

9. A sum of money lent out at simple interest amounts to Rs.600 after two years and to Rs.900 after a further period of 5 years. The interest rate is: [RRB NTPC 22/02/2021 (Evening) ]

Correct Answer: (c) 12.5%
Solution:

10. The capital required to earn a monthly interest of Rs 1,500 at 12% per annum simple interest is: [RRB NTPC 27/02/2021 (Morning) ]

Correct Answer: (b) Rs 1.5 lakhs
Solution: