Thunderball 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 | 1194 | 1.165,8 | |
| 1 | 1586 | 1.554,4 | |
| 2 | 1532 | 1.554,4 | |
| 3 | 1564 | 1.554,4 | |
| 4 | 1548 | 1.554,4 | |
| 5 | 1519 | 1.554,4 | |
| 6 | 1569 | 1.554,4 | |
| 7 | 1524 | 1.554,4 | |
| 8 | 1581 | 1.554,4 | |
| 9 | 1538 | 1.554,4 |
How many different last digits does a draw have?
| Observed | Share | Expected | |
|---|---|---|---|
| 5 different | 1162 | 38,3 % | 39,3 % |
| 4 different | 1484 | 49,0 % | 49,0 % |
| 3 different | 368 | 12,1 % | 11,3 % |
| 2 different | 17 | 0,6 % | 0,4 % |
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.