The winning Washington DC DC-3 numbers for September 21, 1991 were: single 7-7-4.
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 |
|---|---|---|---|---|
| Sep 21, 1991 | Single | 7-7-4 | 18 | 9 |
| Sep 20, 1991 | Single | 5-6-6 | 17 | 8 |
| Sep 19, 1991 | Single | 0-6-9 | 15 | 6 |
| Sep 18, 1991 | Single | 5-5-5 | 15 | 6 |
| Sep 17, 1991 | Single | 9-7-0 | 16 | 7 |
| Sep 16, 1991 | Single | 3-4-0 | 7 | 7 |