Question
Present average age of A, B, and C is 30 years. If 5
years ago, the average age of A and C was 25 years, then find the present age of B.Solution
ATQ, Sum of present ages of A, B, and C = 30 x 3 = 90 years 5 years ago, sum of ages of A and C = 25 x 2 = 50 years So, sum of the present ages of A and C = 50 + 10 = 60 years Therefore, present age of B = 90 - 60 = 30 years
4, 4, 12, 60, ?, 3780
18, 10, 12, 21, ?, 120
What will come in place of the question mark (?) in the following series?
10, 410, ?, 710, 760, 785
380, ?, 360, 324, 260, 160
What will come in place of the question mark (?) in the following series?
45, 66, 44, 67, 43, ?
1024, 256, 768, 192, 576, 144, ?
12, 13, 27, 82, 329, ?
8, 15, 44, 175, 874, ?
290, 571, 900, ?, 1485, 1890
18Â Â Â 19Â Â Â 34Â Â Â 111Â Â Â Â 428Â Â Â Â 2165Â Â Â Â ?
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