The winning Delaware Play 4 numbers for May 15, 2011 were: night 3-9-8-6.
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 15, 2011 | Night | 3-9-8-6 | 26 | 8 |
| May 14, 2011 | Night | 3-0-0-6 | 9 | 9 |
| May 14, 2011 | Day | 6-0-1-4 | 11 | 2 |
| May 13, 2011 | Night | 4-2-0-3 | 9 | 9 |
| May 13, 2011 | Day | 6-2-7-6 | 21 | 3 |
| May 12, 2011 | Night | 1-0-0-6 | 7 | 7 |
| May 12, 2011 | Day | 1-1-4-1 | 7 | 7 |
| May 11, 2011 | Night | 9-1-2-2 | 14 | 5 |
| May 11, 2011 | Day | 4-5-9-2 | 20 | 2 |
| May 10, 2011 | Night | 9-8-0-2 | 19 | 1 |
| May 10, 2011 | Day | 0-9-5-4 | 18 | 9 |
| May 9, 2011 | Night | 4-9-6-8 | 27 | 9 |
| May 9, 2011 | Day | 8-0-4-8 | 20 | 2 |