Question

From the given alternatives, find out the right term which matches the given group.

$42,20,56$

• A. $36$
• B. $24$
• C. $16$
• D. $12$

Answer 1

The correct option is D $12$

The series follows the following rule
$6^2+6=42$
$4^2+4=20$
$7^2+7=56$
$3^2+3=12$
Hence option D is answer.