The winning New York Numbers numbers for September 20, 1980 were: evening 4-0-9.
Sum is the digits added together (5+5+0 = 10). Root sum keeps adding until one digit is left (10 → 1+0 = 1) — many regular players track it in their notebooks. Odd/Even marks each digit O or E (5-5-0 = OOE). High/Low marks 0–4 as L and 5–9 as H (5-5-0 = HHL).
| Date | Draw | Numbers | Sum | Root |
|---|---|---|---|---|
| Sep 20, 1980 | Evening | 4-0-9 | 13 | 4 |
| Sep 19, 1980 | Evening | 3-9-5 | 17 | 8 |
| Sep 18, 1980 | Evening | 9-3-6 | 18 | 9 |
| Sep 17, 1980 | Evening | 1-6-2 | 9 | 9 |
| Sep 16, 1980 | Evening | 2-3-1 | 6 | 6 |
| Sep 15, 1980 | Evening | 9-6-5 | 20 | 2 |