SuperEnalotto last-digit statistics: how are the final digits distributed?
Last digit = the final digit of a number (7, 17, 27 … have the last digit 7). A popular strategy says the winning numbers should have as many different last digits as possible. Here are the figures.
Frequency of each last digit
| Last digit | Observed | Expected | |
|---|---|---|---|
| 0 | 2500 | 2,572.8 | |
| 1 | 2621 | 2,572.8 | |
| 2 | 2610 | 2,572.8 | |
| 3 | 2551 | 2,572.8 | |
| 4 | 2484 | 2,572.8 | |
| 5 | 2669 | 2,572.8 | |
| 6 | 2585 | 2,572.8 | |
| 7 | 2549 | 2,572.8 | |
| 8 | 2566 | 2,572.8 | |
| 9 | 2593 | 2,572.8 |
How many different last digits does a draw have?
| Observed | Share | Expected | |
|---|---|---|---|
| 6 different | 717 | 16.7 % | 17.9 % |
| 5 different | 2091 | 48.8 % | 47.7 % |
| 4 different | 1269 | 29.6 % | 29.7 % |
| 3 different | 204 | 4.8 % | 4.6 % |
| 2 different | 7 | 0.2 % | 0.1 % |
Line with different last digits
Expected values are exact or simulated, assuming purely random draws. The draws follow chance exactly, and a last-digit rule does not change your chance of winning.