3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?
42
43
51
52
Explanation:
The given sequence is a combination of two series :I. 3, 7, 13, 21, 31, ? and II. 4, 7, 13, 22, 34The pattern in I is + 4, + 6, + 8, + 10,…..The pattern in II is + 3, + 6, + 9, + 12,…..
So, missing term = 31 + 12 = 43.
The given sequence is a combination of two series :I. 3, 7, 13, 21, 31, ? and II. 4, 7, 13, 22, 34The pattern in I is + 4, + 6, + 8, + 10,…..The pattern in II is + 3, + 6, + 9, + 12,…..
So, missing term = 31 + 12 = 43.