The winning New York Win 4 numbers for May 18, 1991 were: evening 1-7-7-9.
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 |
|---|---|---|---|---|
| May 18, 1991 | Evening | 1-7-7-9 | 24 | 6 |
| May 17, 1991 | Evening | 9-1-0-3 | 13 | 4 |
| May 16, 1991 | Evening | 0-1-7-2 | 10 | 1 |
| May 15, 1991 | Evening | 8-0-7-8 | 23 | 5 |
| May 14, 1991 | Evening | 7-9-9-2 | 27 | 9 |
| May 13, 1991 | Evening | 7-6-8-8 | 29 | 2 |
| May 12, 1991 | Evening | 7-4-8-2 | 21 | 3 |