What will be the units digit of the square of $189$ ?

What will be the unit digit of the square of $497$?

What will be the units digit of the square of $891$ ?

What will be the units digit of the square of $7890$ ?

Is $1444$ the square of an even number ?

Is $1521$ the square of an even number ?

Is $3844$ the square of an even number ?

Is $676$ the square of an even number ?

Is $729$ the square of an even number ?