Endings to Perfect Squares
There are only 22 possible endings for numbers which are perfect squares.
This becomes helpful when factoring numbers. If you are looking for solutions that contain perfect squares, then the chart below will allow you to reject non-matching endings.
| 00 | 21 | 41 | 64 | 89 |
| 01 | 24 | 44 | 69 | 96 |
| 04 | 25 | 49 | 76 | |
| 09 | 29 | 56 | 81 | |
| 16 | 36 | 61 | 84 |
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