Question

One term in the number series is wrong. Find out the wrong term.

$89,78,86,80,85,82,83$

• A. $83$
• B. $82$
• C. $86$
• D. $78$

Answer 1

Answer: (C)

$86$

It contains two series :

$1^{st}$ series :- $89,86,85,83$

$89-2=87\ne 86,$

$87-2=85,$

$85-2=83$

$2^{nd}$ series :- $78,80,82$

$78+2=80,$

$80+2=82$.

Hence, $86$ is wrong in the series.