The square root of 20 calculated to 10 decimal places.
| Number | Square Root | Perfect Square? |
|---|---|---|
| 15 | 3.8729833462 | No |
| 16 | 4 | Yes |
| 17 | 4.1231056256 | No |
| 18 | 4.2426406871 | No |
| 19 | 4.3588989435 | No |
| 20 | 4.4721359550 | No |
| 21 | 4.5825756950 | No |
| 22 | 4.6904157598 | No |
| 23 | 4.7958315233 | No |
| 24 | 4.8989794856 | No |
| 25 | 5 | Yes |
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