Advent calendar 2021
11 December
The integers are written in a triangle as shown below:
| 1 | ||||||
| 2 | 3 | 4 | ||||
| 5 | 6 | 7 | 8 | 9 | ||
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| etc. | ||||||
Today's number appears directly above the number 750 in the triangle of integers.
| 1 | ||||||
| 2 | 3 | 4 | ||||
| 5 | 6 | 7 | 8 | 9 | ||
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| etc. | ||||||