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GCF and LCM using Prime factorization

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## GCF and LCM using Prime factorization

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**Hitting 2 birds with one stone**GCF and LCM using Prime factorization**First, do a factor tree for both numbers**56 42 2 2 3 7 7 6 8 7 2 3 4 2 2 2 2**GCF and LCM**The GCF is everything in the intersection of the two circles multiplied. GCF = 2 ∙7 = 14 56 42 2 2 3 7 7 6 8 7 2 3 4 2 2 2 2 The LCM is everything in ALL of the two circles multiplied. LCM = 2 ∙ 2 ∙2 ∙3 ∙7 = 168