The winning Michigan Daily 4 numbers for September 21, 1999 were: midday 6-1-2-1; evening 7-8-8-5.
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).
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, 1999 | Evening | 7-8-8-5 | 28 | 1 |
| Sep 21, 1999 | Midday | 6-1-2-1 | 10 | 1 |
| Sep 20, 1999 | Evening | 2-9-6-3 | 20 | 2 |
| Sep 20, 1999 | Midday | 0-7-2-7 | 16 | 7 |
| Sep 18, 1999 | Evening | 3-8-3-1 | 15 | 6 |
| Sep 18, 1999 | Midday | 6-3-4-3 | 16 | 7 |
| Sep 17, 1999 | Evening | 1-0-5-4 | 10 | 1 |
| Sep 17, 1999 | Midday | 5-4-3-3 | 15 | 6 |
| Sep 16, 1999 | Evening | 8-5-5-1 | 19 | 1 |
| Sep 16, 1999 | Midday | 0-5-2-5 | 12 | 3 |
| Sep 15, 1999 | Evening | 7-0-3-2 | 12 | 3 |
| Sep 15, 1999 | Midday | 8-0-4-7 | 19 | 1 |