Find the greatest three digit number which is a perfect square.

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

$7,921$

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

$12,288$

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

$4,205$

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

$2,209$

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

$7,442$

State whether the square of the following number is odd number or not.

$131$

$2,136$