The GCF is 9.
You need at least two numbers to find a GCF.For example:The GCF of 21 and 9 = 3The GCF of 21 and 28 = 7
You need at least two numbers to find a GCF. The GCF of 21 and 42 is 21.
The GCF is 3.
The GCF of 9 and 21 is 3.
The GCF is 7.
The GCF is 3.
The GCF is 3. The LCM is 63.
The GCF is 3.
The greatest common factor (GCF) for 9 and 21 is 3.
3To find the GCF of two or more numbers you can find the factor pairs of each number and then find the factors they have in common.9:1 x 93 x 321:1 x 213 x 7The GCF of 9 and 21 is 3.
The GCF of 21 and 9 is 3. 21 and 9 can only be divided by three.