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The Simple interest on a certain sum for 2 years at 10% per annum is Rs. 90. The corresponding compound interest is:
Rs. 99
Rs. 94.50
Rs. 95.60
Rs. 108
Amit borrowed a certain sum from Babu at a certain rate of simple interest for 2 years. He lent this sum to Charan at the same rate of interest compounded annually for the same period. At the end of two years, he received Rs. 2400 as compound interest but paid Rs. 2000 only as simple interest. Find the rate of interest.
40%
30%
20%
10%
In what time will Rs. 1000 become Rs. 1331 at 10% per annum compounded annually?
1 year
4 years
3 years
6 years
If a sum on compound interest becomes three times in 4 years, then with the same interest rate, the sum will become 81 times in:
18 years
12 years
16 years
14 years
Certain sum becomes 3 times it self at compound interest in 10 years. In how many years it becomes 9 times?
25 years
27 years
30 years
20 years
A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to eight times itself?
16
8
12
20
The difference between compound Interest and simple interest on an amount of Rs. 30,000 for 2 years is Rs. 192. What is the rate of interest per annum?
8%
11%
12%
12.5%
Rs.600
Rs.625
Rs.650
Rs.500
20000
21000
22500
15000
The least number of complete years in which a sum of money put at 20% compound interest will be more than doubled is:
3
2
5
4