The winning Wisconsin Pick 4 numbers for December 21, 2005 were: single 4-0-5-5.
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 21, 2005 | Single | 4-0-5-5 | 14 | 5 |
| Dec 20, 2005 | Single | 0-7-7-7 | 21 | 3 |
| Dec 19, 2005 | Single | 1-2-5-1 | 9 | 9 |
| Dec 18, 2005 | Single | 9-9-5-6 | 29 | 2 |
| Dec 17, 2005 | Single | 6-8-0-0 | 14 | 5 |
| Dec 16, 2005 | Single | 9-0-2-4 | 15 | 6 |
| Dec 15, 2005 | Single | 6-5-4-3 | 18 | 9 |