Identify the term that will replace the ?
3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?

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Solution

The correct option is B 43
The given sequence is a combination of two series
I. 3, 7, 13, 21, 31, ?
II. 4, 7, 13, 22, 34.
The pattern in I is + 4, + 6, + 8, + 10, ..
The pattern in II is + 3, + 6, + 9, + 12,
So, missing term, = 31 + 11 = 43.
Hence, option B is the correct answer.

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