The GCF is 3.
The GCF of 9 and 21 is 3.
The GCF is 3.
The greatest common factor (GCF) for 9 and 21 is 3.
The GCF of 9 and 21 is 3.
The GCF of 21 and 9 is 3. 21 and 9 can only be divided by three.
The greatest common factor (GCF) of 21 and 9 is 3.
The GCF is 3.
The GCF is 3.
The GCF of 21, 24, and 27 is 3.The Greatest Common Factor (GCF) is: 3
The GCF is 3.
3