Find out the wrong term: 1, 5, 5, 9, 7, 11, 11, 15, 12, 17

A. 11

B. 12

C. 17

D. 15

Answer: Option B

Solution(By Examveda Team)

The given sequence is a combination of two series :
I: 1, 5, 7, 11, 12 and
II: 5, 9, 11, 15, 17
The pattern in both I and II is + 4, + 2, + 4, + 2,

So, 12 is wrong and must be replaced by (11 + 2) i.e., 13.