Question

Find the number which does not fit in the given series:

$75,79,72,80,69,83,66,86$

• A. $69$
• B. $72$
• C. $79$
• D. $83$

Answer 1

Answer: (C)

$79$

There are 2 series having alternate terms of the given series:

Series 1: $75,72,,69,66$

In the first series, the numbers decreases by $3$

Series 2: $79,80,83$

In the second series, the numbers are increasing by $3$.

Therefore, $79$ should be replaced by $77$ to obtain the next alternate number as $80$.

Hence, $79$ does not fit in the given series.