# Perfect Square

**Perfect square** is a result of multiplying a whole number by itself.

Whole number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |

Perfect square (square of a whole number) | 0 | 1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | 81 | 100 | 121 | 144 | 169 | 196 | 225 |

Perfect numbers are written on the main diagonal of the multiplication table.

For more information, see squares and square numbers.