The winning Delaware Play 3 numbers for August 10, 1999 were: day 3-9-8; night 4-2-1.
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 |
|---|---|---|---|---|
| Aug 10, 1999 | Night | 4-2-1 | 7 | 7 |
| Aug 10, 1999 | Day | 3-9-8 | 20 | 2 |
| Aug 9, 1999 | Night | 7-6-9 | 22 | 4 |
| Aug 9, 1999 | Day | 6-2-1 | 9 | 9 |
| Aug 8, 1999 | Night | 3-8-3 | 14 | 5 |
| Aug 7, 1999 | Night | 7-9-2 | 18 | 9 |
| Aug 7, 1999 | Day | 5-4-5 | 14 | 5 |
| Aug 6, 1999 | Night | 3-3-8 | 14 | 5 |
| Aug 6, 1999 | Day | 7-9-5 | 21 | 3 |
| Aug 5, 1999 | Night | 7-6-8 | 21 | 3 |
| Aug 5, 1999 | Day | 4-1-3 | 8 | 8 |
| Aug 4, 1999 | Night | 4-4-7 | 15 | 6 |
| Aug 4, 1999 | Day | 8-7-0 | 15 | 6 |