Is $576$ the square of an odd number ?

Is $625$ the square of an odd number ?

Is $6724$ the square of an odd number ?

Is $5329$ the square of an odd number ?

Is $8281$ the square of an odd number ?

Is $1296$ the square of an odd number ?

Evaluate ${39}^2-{38}^2$.

Evaluate ${86}^2-{85}^2$.

Evaluate ${101}^2-{100}^2$.