The winning Michigan Daily 3 numbers for September 21, 1999 were: midday 4-1-0; evening 1-7-9.
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 | 1-7-9 | 17 | 8 |
| Sep 21, 1999 | Midday | 4-1-0 | 5 | 5 |
| Sep 20, 1999 | Evening | 7-5-6 | 18 | 9 |
| Sep 20, 1999 | Midday | 7-0-7 | 14 | 5 |
| Sep 18, 1999 | Evening | 0-1-8 | 9 | 9 |
| Sep 18, 1999 | Midday | 2-7-3 | 12 | 3 |
| Sep 17, 1999 | Evening | 6-6-8 | 20 | 2 |
| Sep 17, 1999 | Midday | 3-1-8 | 12 | 3 |
| Sep 16, 1999 | Evening | 2-6-7 | 15 | 6 |
| Sep 16, 1999 | Midday | 5-8-3 | 16 | 7 |
| Sep 15, 1999 | Evening | 2-7-9 | 18 | 9 |
| Sep 15, 1999 | Midday | 2-4-4 | 10 | 1 |