The winning Washington DC DC-3 numbers for December 28, 1988 were: single 9-3-4.
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 |
|---|---|---|---|---|
| Dec 28, 1988 | Single | 9-3-4 | 16 | 7 |
| Dec 26, 1988 | Single | 5-0-5 | 10 | 1 |
| Dec 23, 1988 | Single | 4-0-8 | 12 | 3 |