The greatest common factor (GCF) of 9, 27, and 63 is 9.
To find the GCF, we first need to determine the factors of each number:
- Factors of 9: 1, 3, 9
- Factors of 27: 1, 3, 9, 27
- Factors of 63: 1, 3, 7, 9, 21, 63
Next, we look for the common factors among these three sets of factors. The common factors are 1, 3, and 9. Among these, the greatest common factor is 9.
Thus, the greatest common factor of 9, 27, and 63 is 9, which means 9 is the largest number that divides each of the three numbers without leaving a remainder.