One term in the number series is wrong. Find out the wrong term. 1, 5, 5, 9, 7, 11, 11, 15, 12, 17
Options:
A . 11
B . 12
C . 17
D . 15
Answer: Option B 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.
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