Question

Find the wrong term in the given series.

$121,143,165,186,209$

• A. $143$
• B. $165$
• C. $186$
• D. $209$

Answer 1

The correct option is C $186$

Explanation:
Each term of the series is increased by $22$ to obtain the next term.
$121+22=143$
$143+22=165$
So, $186$ is wrong and must be replacced by $(165+22)=187$
$187+22=209$
Hence $186$ is the answer