Find the square of $203$.

Find the square of $1098$.

Examine if $725$ is a perfect square.

Examine if $190$ is a perfect square.

Examine if $841$ is a perfect square.

Examine if $1089$ is a perfect square.

Find the square root of $144$ by prime factorisation method.

Find the square root of $256$ by prime factorisation method.

Find the square root of $784$ by prime factorisation method.