This table shows the first few whole numbers and their squares.
1 | 2 |
3 |
4 | 5 | 6 | 7 | 8 | 9 | 10 |
1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | 81 | 100 |
This means that the √81 = 9 and √100 = 10.
It also means that the square root of any number between 81 and 100 lies between 9 and 10.