Based on the provided reference, the number 15 is considered unlucky.
According to the reference, lucky numbers are 1, 5, 2, 3, and 9. On the other hand, unlucky numbers are 6 and 4, with the number 15 being specifically listed as an example of an unlucky number related to 6 (6, 15, 24). Therefore, number 15 falls into the category of unlucky numbers according to this particular reference.
Here is a table summarizing the lucky and unlucky numbers:
| Category | Numbers |
|---|---|
| Lucky Numbers | 1, 5, 2, 3, 9 |
| Unlucky Numbers | 6 (including 15, 24), 4 (including 4, 13, 22) |
It is important to note that the concept of lucky and unlucky numbers can vary across cultures and beliefs. In this instance, we are specifically adhering to the information provided in the reference.
