Question

Which of the following numbers is a perfect square?

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer 1

The correct option is B

$4$

Explanation for the correct option:

Option (B): $4$

A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer.

Here, $4$ can be written as $\left(2\times 2\right)={\left(2\right)}^2$

Explanation for the incorrect options:

Option (A): $2$

$2$ cannot be expressed as the product of an integer by itself or as the second exponent of an integer

Option (C): $6$

$6$ cannot be expressed as the product of an integer by itself or as the second exponent of an integer

Option (D): $8$

$8$ cannot be expressed as the product of an integer by itself or as the second exponent of an integer

Hence, option (B) is correct answer.