Question
2 years ago, the average age of the family of 3 members
is 13 years. A baby is born now; the average age of the family is same as before. Find the age of the baby?Solution
The total present age of the family of 3 members = (13 x 3) + (2 x 3) = 45 A baby is born now; the average age of the family is same as before. The total present age of the family of 4 members (Including the baby) = 13 x 4 = 52 The age of the baby = 52 – 45 = 7 years
632, 625, 611, 590, 562, ?
30, 42, 54, 66, ?, 90
24  12  18  ?  157.5  708.75  3,898.125
150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
What will come in place of the question mark (?) in the following series?
17, 138, 307, 532, ?, 1182
Find the missing number, in the given number series.
60, 150, ?, 450, 450, 225
10, 10, 15, 30, 75, ?
?, 6, 6, 9, 18, 45
10,14,26,42,70,?
In each of the following number series, one term is missing. Find the missing term.
3, 8, 15, 24, 35, ?
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