Question
There are three distinct numbers a, b and c. If a =
200, (a + b) = 500 and (c – b) = 100, find the average of a, b and c.Solution
ATQ, Given, a = 200, (a + b) = 500 and (c – b) = 100 Therefore, b = 500 – 200 = 300 And, c = 300 + 100 = 400 Required average = (200 + 300 + 400)/3 = 300
900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
78, 80, 84, ?, 108, 140
5 6 14 45 ? 925
...1, 26, 75, 156, 277, ?
138, 140, 152, 174, ?, 248
11, ? 220,  660, 1320,  1320Â
114, 134, 174, 254, 414, ?Â
14 6 4 4 ? 48
...What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
7, 8, 18, 57, 232, ?