The winning Delaware Play 3 numbers for December 15, 1999 were: day 6-6-7; night 9-2-7.
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).
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 |
|---|---|---|---|---|
| Dec 15, 1999 | Night | 9-2-7 | 18 | 9 |
| Dec 15, 1999 | Day | 6-6-7 | 19 | 1 |
| Dec 14, 1999 | Night | 7-7-7 | 21 | 3 |
| Dec 14, 1999 | Day | 0-5-7 | 12 | 3 |
| Dec 13, 1999 | Night | 1-3-0 | 4 | 4 |
| Dec 13, 1999 | Day | 1-7-3 | 11 | 2 |
| Dec 12, 1999 | Night | 7-4-5 | 16 | 7 |
| Dec 11, 1999 | Night | 5-4-4 | 13 | 4 |
| Dec 11, 1999 | Day | 0-9-7 | 16 | 7 |
| Dec 10, 1999 | Night | 7-3-5 | 15 | 6 |
| Dec 10, 1999 | Day | 7-5-7 | 19 | 1 |
| Dec 9, 1999 | Night | 6-1-3 | 10 | 1 |
| Dec 9, 1999 | Day | 9-4-1 | 14 | 5 |