Identify whether the following number is perfect square or not? Give reason.

$249$

Identify whether the following number is perfect square or not? Give reason.

$1024$

Identify whether the following number is perfect square or not? Give reason.

$12,100$

Identify whether the following number is perfect square or not? Give reason.

$54,900$

Find the smallest number by which the given number must be multiplied to make it a perfect square.

$882$

Find the smallest number by which the given number must be multiplied to make it a perfect square.

$432$

Find the smallest number by which the given number must be multiplied to make it a perfect square.

$1,331$

Find the smallest number by which the given number must be multiplied to make it a perfect square.

$845$

Find the smallest number by which the given number must be multiplied to make it a perfect square.

$3,698$