630
315,2
105,3,2
35,3,3,2
7,5,3,3,2
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110 55,2 11,5,2
45 5, 9 5, 3, 3
A factor tree is a way to notate the process of finding the prime factorization of a given number.
a factor tree
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