The greatest common factor (GCF) of 9 and 36 is 9.
To find the GCF, you can list the factors of each number:
- Factors of 9: 1, 3, 9
- Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
The common factors are 1, 3, and 9, with the greatest being 9. So, the GCF of 9 and 36 is 9.