Question

State true or false:

The number $7928$ is a perfect square.

• A. True
• B. False

Answer 1

The correct option is B False

The square of any number ends in the digits $0$, $1$, $4$, $5$, $6$ or $9$.
Example:-
$1^2=1$
${12}^2=144$
${13}^2=139$
$5^2=25$
Also, a perfect square has even number of zeros at the end. Example :- $100,400,640000$.
Here, the number is $7928$.
It ends with $8$. Therefore it is not a perfect square.