Simple Interest (Railway Maths) (Part – I)

Total Questions: 50

11. Ramesh sharma borrows Rs 8,000 for 3 years at 5% p.a. simple interest. He lends it to Manohar at 7% p.a. for 3 years. Find his gain? [NTPC CBT - I 08/01/2021 (Evening) ]

Correct Answer: (b) Rs. 480
Solution:

12. Balaji invested 1/7 of his total investment at 4%, 1/2 at 5% and the rest at 6% for 1 year. He received a total interest of Rs.730. What was the total sum invested? [NTPC CBT - I 21/01/2021 (Evening) ]

Correct Answer: (b) Rs.14,000
Solution:

13. How much money (in Rs.) at compound interest will amount to Rs. 5,000 in 3 years if the rate of interest is 2% for the 1st year, 3% for the 2nd year and 4% for the 3rd year? [NTPC CBT - I 16/02/2021 (Morning) ]

Correct Answer: (c) 5000/1.09
Solution:

14. Mr Ram invests an amount of Rs. 12,200 at the rate of 2% per annum for 4 years to obtain a simple interest. Later he invests the principal as well as the amount obtained as simple interest for another 4 years at the same rate of interest. What amount of simple interest will he get at the end of the last 4 years? [NTPC CBT - I 23/02/2021 (Morning) ]

Correct Answer: (c) Rs.1,054.08
Solution:

15. A man invests money in three different schemes for 6 years, 10 years and 12 years, at 10%, 12% and 15% simple interest , respectively. If at the completion of each scheme, he gets the same interest then the ratio of the respective investments is: [NTPC CBT - I 01/03/2021 (Morning) ]

Correct Answer: (c) 6 : 3 : 2
Solution:

16. Find the answer of given question? [NTPC CBT - I 14/03/2021 (Morning) ]

Correct Answer: (c) Rs. 38400
Solution:

17. If a sum invested at simple interest triples itself in 8 years, how many times of itself will it be in 12 years? [NTPC CBT - I 15/03/2021 (Morning)]

Correct Answer: (a) 4 times
Solution:

18. A sum of money when invested for 7.2 years gives Rs 5,768 as the amount on maturity. If the Simple rate of Interest was 2% per annum more than what it was, the amount on maturity would have been Rs 6,272. The original sum invested was: [NTPC CBT - I 23/07/2021 (Morning)]

Correct Answer: (a) Rs. 3,500
Solution:

19. The Simple Interest for the first 2 years is 6%, next 2 years is 7% and for any number of years exceeding 4 years is 8%. Find the total interest on a principal ‘P’ at the end of 7 years. [RRB JE 31/05/2019 (Afternoon)]

Correct Answer: (b) P/2
Solution:

20. A sum of money was invested at the rate of 7.5% simple interest per annum for 4 years. If the investment was for 5 years, the interest earned would have been ₹375 more. What was the initial sum invested? [RRB ALP Tier-I 09/08/2018 (Afternoon)]

Correct Answer: (b) ₹5,000
Solution: