# 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

Q51. **If x is the interest on y and y is the interest on z, the rate and time is the same on both the cases. What is the relation between x, y and z?**

1.  xyz = 1
2.  X^2 = yz
3.  Y^2 = xz
4.  Z^2 = xy

Solution : Y^2 = xz
Q52. **Rs.2500 is divided into two parts such that if one part be put out at 5% simple interest and the other at 6%, the yearly annual income may be Rs.140. How much was lent at 5%?**

1.  Rs.1500
2.  Rs.1300
3.  Rs.1200
4.  Rs.1000

Solution : Rs.1000

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Q53. **If Re.1 amounts to Rs.9 over a period of 20 years. What is the rate of simple interest?**

1.  26 2/3 %
2.  30 %
3.  27 1/2%
4.  40 %

Solution : 40 %
Q54. **4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?**

1.  Rs.2500
2.  Rs.2700
3.  Rs.2800
4.  Rs.5000

Solution : Rs.2800

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Q55. **If rupee one produces rupees nine over a period of 40 years, find the rate of simple interest?**

1.  20 %
2.  10 %
3.  15 %
4.  22 1/2%

Solution : 22 1/2%
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