Find whether the square of the following number is odd number or an even number.

$727$

Find whether the square of the following number is odd number or an even number.

$158$

Find whether the square of the following number is odd number or an even number.

$269$

Find whether the square of the following number is odd number or an even number.

$1980$

What will be the number of zeros in the square of $60$?

What will be the number of zeros in the square of $400$?

How many non-square numbers lie between the following pair of numbers.

${100}^2 \text{and} {101}^2$

How many non-square numbers lie between the following pair of numbers.

${90}^2 \text{and} {91}^2$