The winning Delaware Play 3 numbers for May 10, 1978 were: night 4-2-9.
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 10, 1978 | Night | 4-2-9 | 15 | 6 |
| May 9, 1978 | Night | 6-1-5 | 12 | 3 |
| May 8, 1978 | Night | 1-8-9 | 18 | 9 |
| May 6, 1978 | Night | 7-4-3 | 14 | 5 |
| May 5, 1978 | Night | 2-7-8 | 17 | 8 |
| May 4, 1978 | Night | 1-0-7 | 8 | 8 |