The winning Michigan Daily 4 numbers for October 21, 1998 were: midday 8-9-7-7; evening 5-8-1-3.
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 |
|---|---|---|---|---|
| Oct 21, 1998 | Evening | 5-8-1-3 | 17 | 8 |
| Oct 21, 1998 | Midday | 8-9-7-7 | 31 | 4 |
| Oct 20, 1998 | Evening | 6-6-1-9 | 22 | 4 |
| Oct 20, 1998 | Midday | 9-3-0-0 | 12 | 3 |
| Oct 19, 1998 | Evening | 4-0-8-6 | 18 | 9 |
| Oct 19, 1998 | Midday | 4-6-2-4 | 16 | 7 |
| Oct 17, 1998 | Evening | 1-1-3-6 | 11 | 2 |
| Oct 17, 1998 | Midday | 1-8-9-8 | 26 | 8 |
| Oct 16, 1998 | Evening | 8-5-4-8 | 25 | 7 |
| Oct 16, 1998 | Midday | 1-6-1-0 | 8 | 8 |
| Oct 15, 1998 | Evening | 9-9-5-4 | 27 | 9 |
| Oct 15, 1998 | Midday | 4-5-9-1 | 19 | 1 |