The winning Delaware Play 4 numbers for September 21, 1998 were: day 4-7-4-1; night 8-9-2-8.
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).
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 21, 1998 | Night | 8-9-2-8 | 27 | 9 |
| Sep 21, 1998 | Day | 4-7-4-1 | 16 | 7 |
| Sep 20, 1998 | Night | 3-4-8-0 | 15 | 6 |
| Sep 19, 1998 | Night | 5-1-5-6 | 17 | 8 |
| Sep 19, 1998 | Day | 2-7-8-1 | 18 | 9 |
| Sep 18, 1998 | Night | 5-2-3-1 | 11 | 2 |
| Sep 18, 1998 | Day | 0-2-2-9 | 13 | 4 |
| Sep 17, 1998 | Night | 0-5-9-5 | 19 | 1 |
| Sep 17, 1998 | Day | 8-1-3-9 | 21 | 3 |
| Sep 16, 1998 | Night | 9-1-4-2 | 16 | 7 |
| Sep 16, 1998 | Day | 6-5-2-0 | 13 | 4 |
| Sep 15, 1998 | Night | 8-3-8-3 | 22 | 4 |
| Sep 15, 1998 | Day | 9-0-2-3 | 14 | 5 |