The winning Connecticut Play3 numbers for September 21, 2021 were: day 5-3-1; night 2-6-1.
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, 2021 | Night | 2-6-1 | 9 | 9 |
| Sep 21, 2021 | Day | 5-3-1 | 9 | 9 |
| Sep 20, 2021 | Night | 6-0-1 | 7 | 7 |
| Sep 20, 2021 | Day | 2-1-8 | 11 | 2 |
| Sep 19, 2021 | Night | 9-7-6 | 22 | 4 |
| Sep 19, 2021 | Day | 6-7-7 | 20 | 2 |
| Sep 18, 2021 | Night | 5-5-5 | 15 | 6 |
| Sep 18, 2021 | Day | 9-5-0 | 14 | 5 |
| Sep 17, 2021 | Night | 5-0-7 | 12 | 3 |
| Sep 17, 2021 | Day | 4-9-5 | 18 | 9 |
| Sep 16, 2021 | Night | 3-0-4 | 7 | 7 |
| Sep 16, 2021 | Day | 0-6-6 | 12 | 3 |
| Sep 15, 2021 | Night | 1-8-6 | 15 | 6 |
| Sep 15, 2021 | Day | 3-2-8 | 13 | 4 |