In the following Three questions, a series is given, with one of term missing. Choose the correct alternative from the given ones that will complete the series.
1, 5, 13, 25, 41, 61, ?
Given series is 1, 5, 13, 25, 41, 61, ?
5 - 1 = 4
13 - 5 = 8
25 - 13 = 12
41 - 25 = 16
61 - 41 = 20
The difference between consecutive numbers is multiple of 4
$$\Rightarrow$$ The next difference is 24
$$\therefore\ $$Required number = 61 + 24 = 85
Hence, the correct answer is Option A
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