The winning Delaware Play 4 numbers for May 16, 2021 were: night 2-1-3-5.
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 16, 2021 | Night | 2-1-3-5 | 11 | 2 |
| May 15, 2021 | Night | 6-0-6-4 | 16 | 7 |
| May 15, 2021 | Day | 0-0-8-1 | 9 | 9 |
| May 14, 2021 | Night | 0-4-8-2 | 14 | 5 |
| May 14, 2021 | Day | 3-8-2-5 | 18 | 9 |
| May 13, 2021 | Night | 2-5-1-2 | 10 | 1 |
| May 13, 2021 | Day | 8-0-5-2 | 15 | 6 |
| May 12, 2021 | Night | 1-8-5-1 | 15 | 6 |
| May 12, 2021 | Day | 8-1-8-2 | 19 | 1 |
| May 11, 2021 | Night | 2-2-6-3 | 13 | 4 |
| May 11, 2021 | Day | 4-0-3-9 | 16 | 7 |
| May 10, 2021 | Night | 1-5-7-5 | 18 | 9 |
| May 10, 2021 | Day | 5-5-8-9 | 27 | 9 |