Express $49$ as the sum of $7$ odd numbers.
 

How many numbers lie between squares of the following numbers

$12$ and $13$

Find the square of following number containing $5$ in unit's place.

${15}^2$

Find the square of following number containing $5$ in unit's place.

${95}^2$

Find the square of following number containing $5$ in unit's place.

${105}^2$

Find the square of following number containing $5$ in unit's place.

${205}^2$