The winning Delaware Play 4 numbers for March 15, 1998 were: night 4-1-6-4.
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 |
|---|---|---|---|---|
| Mar 15, 1998 | Night | 4-1-6-4 | 15 | 6 |
| Mar 14, 1998 | Night | 6-6-2-5 | 19 | 1 |
| Mar 14, 1998 | Day | 5-3-9-7 | 24 | 6 |
| Mar 13, 1998 | Night | 8-1-5-2 | 16 | 7 |
| Mar 13, 1998 | Day | 5-2-9-3 | 19 | 1 |
| Mar 12, 1998 | Night | 5-8-6-5 | 24 | 6 |
| Mar 12, 1998 | Day | 8-9-2-4 | 23 | 5 |
| Mar 11, 1998 | Night | 8-1-1-7 | 17 | 8 |
| Mar 11, 1998 | Day | 0-8-2-5 | 15 | 6 |
| Mar 10, 1998 | Night | 0-1-3-6 | 10 | 1 |
| Mar 10, 1998 | Day | 0-1-8-6 | 15 | 6 |
| Mar 9, 1998 | Night | 0-4-9-6 | 19 | 1 |
| Mar 9, 1998 | Day | 6-9-2-1 | 18 | 9 |