The winning Michigan Daily 3 numbers for May 21, 1998 were: midday 3-5-5; evening 6-3-3.
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 |
|---|---|---|---|---|
| May 21, 1998 | Evening | 6-3-3 | 12 | 3 |
| May 21, 1998 | Midday | 3-5-5 | 13 | 4 |
| May 20, 1998 | Evening | 1-8-6 | 15 | 6 |
| May 20, 1998 | Midday | 9-2-0 | 11 | 2 |
| May 19, 1998 | Evening | 9-7-9 | 25 | 7 |
| May 19, 1998 | Midday | 7-7-8 | 22 | 4 |
| May 18, 1998 | Evening | 8-5-7 | 20 | 2 |
| May 18, 1998 | Midday | 3-9-2 | 14 | 5 |
| May 16, 1998 | Evening | 1-9-1 | 11 | 2 |
| May 16, 1998 | Midday | 5-0-3 | 8 | 8 |
| May 15, 1998 | Evening | 7-9-5 | 21 | 3 |
| May 15, 1998 | Midday | 4-8-1 | 13 | 4 |