Simple and Compound Interest

Simple and Compound Interest: Difference between simple and compound interest, Simple Interest Formula and Compound Interest Formula, Simple Interest Questions

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Online Aptitude Questions with Answers on Simple and Compound Interest

Q56. **A certain sum of money doubles itself in 10 years in how much many years will it trible itself at the same rate?**

1.  20 years
2.  15 years
3.  30 years
4.  17 1/2 years

Solution : 20 years
Q57. **Rs.1500 is divided into two parts such that if one part is invested at 6% and the other at 5% the whole annual interest from both the sum is Rs.85. How much was lent at 5%?**

1.  Rs.1000
2.  Rs.750
3.  Rs.600
4.  Rs.500

Solution : Rs.500

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Q58. **The simple interest on a sum of money is 4/9 of the principal and the number of years is equal to the rate percent. Find the rate and the time?**

1.  6 2/3 years; 6 2/3 %
2.  5 1/3 years; 5 1/3 %
3.  4 2/3 years; 4 2/3 %
4.  None of these

Solution : 6 2/3 years; 6 2/3 %
Q59. **In what time will Rs.4000 lent at 3% per annum on simple interest earn as much interest as Rs.5000 will earn in 5 years at 4% per annum on simple interest?**

1.  8 1/3 years
2.  9 years
3.  7 1/2 years
4.  7 1/3 years

Solution : 8 1/3 years

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Q60. **In how many years will a sum of money doubles itself at 5% per annum on simple interest?**

1.  22 years
2.  20 years
3.  21 years
4.  29 years

Solution : 20 years
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