Question

In the given question, select the related number from the given alternatives.
$49$ $:$ $81$ $:$ $:$ $100$ $:$ $?$

• A. $64$
• B. $144$
• C. $169$
• D. None of these

Answer 1

The correct option is B $144$

$49=7^2$

$81=(7+2{)}^2=9^2$

Similarly,

$100={10}^2$

$144=(10+2{)}^2={12}^2$

Hence, B is the correct option.