The winning Delaware Play 4 numbers for April 16, 1981 were: night 2-8-1-7.
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 |
|---|---|---|---|---|
| Apr 16, 1981 | Night | 2-8-1-7 | 18 | 9 |
| Apr 13, 1981 | Night | 0-1-1-7 | 9 | 9 |
| Apr 10, 1981 | Night | 3-4-1-2 | 10 | 1 |