The winning Michigan Daily 3 numbers for May 21, 2015 were: midday 2-4-0; evening 1-3-8.
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, 2015 | Evening | 1-3-8 | 12 | 3 |
| May 21, 2015 | Midday | 2-4-0 | 6 | 6 |
| May 20, 2015 | Evening | 4-7-9 | 20 | 2 |
| May 20, 2015 | Midday | 4-7-1 | 12 | 3 |
| May 19, 2015 | Evening | 1-1-5 | 7 | 7 |
| May 19, 2015 | Midday | 9-5-8 | 22 | 4 |
| May 18, 2015 | Evening | 9-7-4 | 20 | 2 |
| May 18, 2015 | Midday | 0-3-8 | 11 | 2 |
| May 17, 2015 | Evening | 5-6-0 | 11 | 2 |
| May 17, 2015 | Midday | 3-3-2 | 8 | 8 |
| May 16, 2015 | Evening | 0-7-3 | 10 | 1 |
| May 16, 2015 | Midday | 8-8-2 | 18 | 9 |
| May 15, 2015 | Evening | 7-7-7 | 21 | 3 |
| May 15, 2015 | Midday | 0-4-4 | 8 | 8 |