The winning Washington DC DC-4 numbers for May 10, 1988 were: single 7-7-0-3.
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 |
|---|---|---|---|---|
| May 10, 1988 | Single | 7-7-0-3 | 17 | 8 |
| May 7, 1988 | Single | 6-7-5-5 | 23 | 5 |
| May 5, 1988 | Single | 5-6-0-0 | 11 | 2 |