Question

Which of the following is a perfect square?

• A. 17
• B. 24
• C. 54
• D. 64

Answer 1

The correct option is D 64

Perfect square is a number that is a product of 2 equal factors.
$4^2=16$
$5^2=25$
No natural number exists in between 4 and 5. So, no square number exists between 16 and 25.
$\therefore$ 17 and 24 are not perfect squares.
$7^2$ = 49
$8^2$ = 64
No natural number exists in between 7 and 8. So, no square number exists between 49 and 64.
$\therefore$ 54 is not a perfect square.
Hence, 64 is the only perfect square here.