"Common" means " belonging to two or more quantities."
List the factors of the numbers you are comparing. The common factors appear on all the lists.
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
The least common factor is always 1.
The least common factor of any set of integers is 1.
There is always a common factor. If there are no common prime factors, the GCF is 1.
7
To find a common factor, you need at least two numbers.
The Greatest Common Factor (GCF) is: 12
The greatest common factor (GCF) is 5.
The greatest common factor (GCF) is 4.
The greatest common factor (GCF) is 3.
The greatest common factor (GCF) is 2.
The only factor they have in common is 1. It has to be the greatest.