Question

Is $\sqrt{64}$ a perfect square.

• A.
• B.

Answer 1

The correct option is B

If the square root of a number is a whole number then it is called perfect square.

$\sqrt{64}=8$

We have to check if 8 is a perfect square.

4 < 8 < 9

$\sqrt{4}<\sqrt{8}<\sqrt{9}$

$2<\sqrt{8}<3$

$\sqrt{8}$ lies between 2 and 3 and there is no natural number that lies between 2 and 3.

Hence $\sqrt{8}$ is not equal to a natural number. Hence it is not a perfect square.