What is the GCF of 12 and 9?
Greatest Common Factor of two or more numbers is the largest possible number which divides the given numbers exactly without any remainder.
Answer: GCF of 12 and 9 is 3
Explanation:
We can find the GCF by the following methods

Prime factorization Method

Listing the common factors Method

Long division Method
GCF of 12 and 9 by Listing the Common Factors
Factors of 12 : 1, 2, 3, 4, 6, and 12
Factors of 9 : 1, 3, and 9
Common Factors of 12 and 9 : 1, and 3
Greatest Common Factor from the list = 3
GCF of 12 and 9 is 3
GCF of 12 and 9 by Prime factorization
Prime factorization of 12 : 2 x 2 x 3
Prime factorization of 9 : 3 x 3
We see that the common factor is only 3.