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Question 1
Rs. 808 is divided into parts such that the compound amount on first part after 6 years is same as that for the other part after 7 years. What is the first part if the rate of interest in both the cases is 2%?
Question 2
What is compound interest on Rs. 90000 after 2 years, invested at a rate of 3% compounded annually?
Question 3
The compound interest on a certain sum of money at 3% for a period of 2 years is Rs. 5481. What is the SI on this sum if the rate is halved, and time doubled?
Rs. 5400.
Rs. 5500.
Rs. 5300.
Rs. 5600.
Ans: a
The shortcut formula is CI = Pr(r + 200)/10000. Putting CI = 5481, r = 3, we get 5481 = ${P × 3 × (3 + 200)}/10000$. We can solve it to get P = Rs. 90000. The SI = P × (2 × t) × (r / 200) = P × t × (r / 100). Putting t = 2, r = 3 and P = 90000, we get SI = Rs. 5400.
Question 4
The compound interest on a certain sum of money at 5% for a period of 2 years is Rs. 3075. What is the SI on this sum if the rate is halved, and time doubled?
Rs. 3000.
Rs. 3100.
Rs. 2900.
Rs. 3200.
Ans: a
The shortcut formula is CI = Pr(r + 200)/10000. Putting CI = 3075, r = 5, we get 3075 = ${P × 5 × (5 + 200)}/10000$. We can solve it to get P = Rs. 30000. The SI = P × (2 × t) × (r / 200) = P × t × (r / 100). Putting t = 2, r = 5 and P = 30000, we get SI = Rs. 3000.
Question 5
What is the difference in compound interest and simple interest on an amount of Rs. 40000 for a period of 2 years if the rate is 7% p.a. compounded annually?
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This Blog Post/Article "Compound Interest Quiz Set 018" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2020-02-07. Published on: 2016-04-30