Question
Simple interest and compound interest (compounded
annually) earned on a sum at the end of 2 years at a certain rate of interest p.a. are Rs. 1200 and Rs. 1275 respectively. Find the rate of interest.Solution
Simple interest for 1 year = 1200/2 = Rs. 600 Difference between compound Interest and Simple Interest for 2 years = 1275 - 1200 = Rs. 75 Desired rate = (75/600) ×  100 = 12.5%
15   8   9   15   32    ?    250.5
What will come in place of the question mark (?) in the following series?
146, 122, ? , 74, 50, 26
188    178    158   ?     88    38
5 6 15 40 89 170 ?
...Find the missing number in the given number series.
 6, 13, 32, 87, ?, 737
What will come in place of the question mark (?) in the following series?
1.5, 3.5, 9.5, 27.5, 81.5, 243.5, ?
114, 156, ?, 238, 274, 304
204, ?, 120, 83, 52, 23
- What will come in place of the question mark (?) in the following series?
1, 2, 5, 16, 65, ? What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
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