Math Questions based on Simple and Compound Interest
Ans: Rs. 2560
Q2. Find the amount of Rs. 1700 invested at 16% half yearly at simple interest for one year?
Ans: Rs. 2244
Q3. A sum of Rs. 400 would become Rs. 441 after 2 years at r% compound interest, find the value-
Ans: 5%
Q4. At compound interest, if a certain sum of money doubles in n years, then the amount will be four fold in-
Ans: 2n
Q5. The least number of complete years in which a sum of money put at 20% CI will be will be more than doubled is-
Ans: 4 years
Q6. A sum of Rs. 2400 deposited at CI, doubled after 5 years. After 20 years it will become-
Ans: 16 times
Q7. The difference between CI and SI on a sum of money lent for 2 years at 10% is Rs. 40. The sum is-
Ans: Rs. 4000
Q8. The ratio of CI for 3 years and SI for 1 year for a fixed amount at a rate of r% is 3.64. What is the value of r?
Ans: 3.64
Q9. A sum of money becomes 13/5 times of itself in 32 years at r% of SI. What is the value of r?
Ans: 5%
Q10. The difference between interest received b A and B is Rs. 18 on Rs. 1500 for 3 year. What is the difference in rate of interest?
Ans: 0.4