The winning Delaware Play 4 numbers for April 21, 1991 were: night 1-6-9-3.
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 |
|---|---|---|---|---|
| Apr 21, 1991 | Night | 1-6-9-3 | 19 | 1 |
| Apr 20, 1991 | Night | 7-4-9-9 | 29 | 2 |
| Apr 19, 1991 | Night | 6-4-8-2 | 20 | 2 |
| Apr 18, 1991 | Night | 9-0-6-4 | 19 | 1 |
| Apr 17, 1991 | Night | 2-8-7-9 | 26 | 8 |
| Apr 16, 1991 | Night | 8-3-9-4 | 24 | 6 |
| Apr 15, 1991 | Night | 7-8-2-5 | 22 | 4 |