2 and 4 are factors of 8. To be common, they need to be compared to another set of factors.
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Here is a factor tree of eight: 8 / \ 4 2 / \ 2 2
1, 2, 4, 8
64 / \ that's one of them 8 8 / \ / \ 4 4 4 4 /\ / \/\/\ 22 2 2 2 2
Number which is a factor of 8 butnot a multiple of 4 = 1factors of 8 = 1, 2, 4, 8multiples of 4 = 4, 8, 12, 16, 20, 24, 28,...
Factor the numbers and then look for the largest factor common to both.Factors of 8 are 1, 2, 4, and 8.Factors of 52 are 1, 2, 4, 13, 26, and 52.The greatest common factor (GCF) is 4.