3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?

1.	3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?
Answer» The given sequence is a combination of two series : I. 3, 7, 13, 21, 31, ? and 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 + 12 = 43.

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