Make an organized list with the factors for each number.
4
Practice makes perfect
The greatest common factor (GCF) is the greatest number that is a factor of two or more numbers. To find the GCF, we will make an organized list of the factors for each number.
Given number
Common factors
32
1, 2, 4, 8, 16, and 32
52
1, 2, 4, 13, 26, and 52
In the table we can see that the GCF is 4 because it is the greatest factor that 32 and 52 share.
