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Factors of 12: 1, 2, 3, 4, 6, 12

Factors of 15: 1, 3, 5, 15

Factors of 35: 1, 5, 7, 35

GCF (12, 15, 35) = 1

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Q: What is the greatest common factor of 12 15 and 35 using factor trees?
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