Question

The square root of sum of the digits in the square of $121$ is

• A. $4$
• B. $3$
• C. $6$
• D. $9$

Answer 1

The correct option is A $4$

The square root of sum of digits in the square of 121

$So{l}^n$ square of $121=14641$

sum of digits $\Rightarrow 1+4+6+4+1=16$

and square root of 16;

$\sqrt{16}=4$