Question
A man invested a certain amount of sum at 12.5% per
annum simple interest and earned an interest of Rs.1800 after 2 years. If the same amount is invested at 20% per annum compound interest, compounded annually for two years, then find the interest.Solution
Let the certain sum of money be Rs.P. So,  P x 0.125 x 2 = 1800 => P = Rs.7200 Desired interest = [(1.2)2 – 1] x 7200 = Rs.3168
More Percentage Questions
What will come in place of the question mark (?) in the following series?
34, 61, 7, ?, -20, 115
580 557 528 497 ? 419
52, 77, 127, ?, 302, 427
4    9    28    99    ?   2105   12660
...155, 157, 160, ?, 172, 183
18, 37, 60, ?, 120, 157
250 Â Â Â 25 Â Â Â Â 5 Â Â Â Â ? Â Â Â Â 0.6 Â Â Â Â Â 0.3
110, 156, 212, ?, 354, 440
72, 216, 54, 270, ?, 315
60, 120, ?, 160, 32, 192
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