Factor trees are a way to notate the process of finding the prime factorization of a given number. Since each number has its own unique prime factorization, each has its own single factor tree.
Here is a factor tree of eight: 8 / \ 4 2 / \ 2 2
1 is the only common factor of 8 and 9.
It is 1 = one
The only common factor is: 1
The only common factor of 4, 8, and 15 is ' 1'.
The [only] common factor of 8 and 61 is 1.
The greatest common factor of 20, 8, and 5 is 1. (5 only has two factors: 1 and 5, and 5 is not a factor of 8.)
The only common factor is 1.
The only common factor of those two numbers is 1.
the factors of 753 are 3 and 251 and 251 have only one factor that is 1 hence 8 is not a factor of 753
1, considering the only factors of 1 is itself.
Make a factor-tree and the look for the matches of their prime factorization... Using 6 and 8: 6......... 8 2x3.....4x2 .........2x2 so the prime factorization of 6 is 2x3 and 8 is 2x2x2 so the only match you have is two so the gcf of 6 and 8 is 2