# Perfect Squares

A perfect square is an integer which is the square of another integer $n$ , that is, ${n}^{2}$ . (Since a negative times a negative is positive, a perfect square is always positive.

The first few perfect squares are listed below:

 Perfect Squares ${0}^{2}=0$ ${10}^{2}=100$ ${1}^{2}=1$ ${11}^{2}=121$ ${2}^{2}=4$ ${12}^{2}=144$ ${3}^{2}=9$ ${13}^{2}=169$ ${4}^{2}=16$ ${14}^{2}=196$ ${5}^{2}=25$ ${15}^{2}=225$ ${6}^{2}=36$ ${16}^{2}=256$ ${7}^{2}=49$ ${17}^{2}=289$ ${8}^{2}=64$ ${18}^{2}=324$ ${9}^{2}=81$ ${19}^{2}=361$