The common factors are: 1, 3, 9
There cannot be a common factor of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
9 is not a factor of 24, common or otherwise.
The least common factor of 4 and 9 is is: 1
The Greatest Common Factor (GCF) is: 9
The Greatest Common Factor (GCF) is: 9
The common factor is 1.
the least common factor and only common factor of 9, 36, and 64 is 1.
The greatest common factor of 9 , 8 = 1
The greatest common factor of 9 and 25 is 1
The greatest common factor of 9 and 620 is 1.
The Greatest Common Factor of 9, 23 is 1.
The greatest common factor of 9 and 618 is 3