The winning Delaware Play 3 numbers for October 21, 1999 were: day 6-1-7; night 5-8-1.
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 |
|---|---|---|---|---|
| Oct 21, 1999 | Night | 5-8-1 | 14 | 5 |
| Oct 21, 1999 | Day | 6-1-7 | 14 | 5 |
| Oct 20, 1999 | Night | 1-5-0 | 6 | 6 |
| Oct 20, 1999 | Day | 9-8-9 | 26 | 8 |
| Oct 19, 1999 | Night | 0-6-0 | 6 | 6 |
| Oct 19, 1999 | Day | 0-3-1 | 4 | 4 |
| Oct 18, 1999 | Night | 5-3-6 | 14 | 5 |
| Oct 18, 1999 | Day | 1-5-1 | 7 | 7 |
| Oct 17, 1999 | Night | 7-2-9 | 18 | 9 |
| Oct 16, 1999 | Night | 4-5-9 | 18 | 9 |
| Oct 16, 1999 | Day | 0-5-3 | 8 | 8 |
| Oct 15, 1999 | Night | 3-5-7 | 15 | 6 |
| Oct 15, 1999 | Day | 8-2-4 | 14 | 5 |