The winning Washington DC DC-3 numbers for April 6, 1988 were: single 1-7-6.
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 6, 1988 | Single | 1-7-6 | 14 | 5 |
| Apr 5, 1988 | Single | 4-7-3 | 14 | 5 |
| Apr 4, 1988 | Single | 7-7-3 | 17 | 8 |
| Apr 2, 1988 | Single | 8-6-9 | 23 | 5 |
| Mar 31, 1988 | Single | 1-3-1 | 5 | 5 |