The greatest common factor (GCF) of the numbers 6, 8, and 9 is 1.
To find the GCF, we start by determining the factors of each number:
- Factors of 6: 1, 2, 3, 6
- Factors of 8: 1, 2, 4, 8
- Factors of 9: 1, 3, 9
Next, we identify the common factors in each set:
- Common factors of 6, 8, and 9: 1
Since 1 is the only factor that appears in all three sets, the greatest common factor of 6, 8, and 9 is 1.