Question
What is the principal sum if the
difference between simple interest (SI) and compound interest (CI), compounded annually, on a certain amount over 2 years at an annual rate of 15% is Rs. 90?Solution
ATQ,
Let, the sum of money is Rs. 100x CI earned at the end of 2 years = [(1.15)2 – 1] × 100x = Rs. 32.25x SI earned at the end of 2 years = 0.15 × 2 × 100x = Rs. 30x So, 32.25x – 30x = 90 Or, 2.25x = 90 Or, x = 40 Desired sum = 40 × 100 = Rs.4000
What will come in place of the question mark (?) in the following series?
1528, 1416, 1204, ?, 480, -32
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
96 89 ? 90 94 91
...What value should come in the place of (?) in the following number series?
19, 235, 260, 324, 333, ?
What will come in place of the question mark (?) in the following series?
305...
In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
1515, 184, ?, 455, 967, 624
7 29 61 ? 211 349
...
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