Exams › SSC CGL (Prelims) › General

What number will replace the question mark? $2, 6, 14, 30, ?, 126$

1. 46
2. 60
3. 62
4. 64

Correct answer: 62

Solution

The differences are $+4, +8, +16, +32, +64$. So the missing term is $30 + 32 = 62$, and then $62 + 64 = 126$ matches the last term. This is a doubling-difference series.

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