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Anonymous
The GCF is 3.
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gcf(15, 42) = 3.
The GCF is 21.
Factors of 15: 1, 3, 5, 15. Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42. GCF (15, 42) = 3
The GCF of 42 and 35 is 7.factors of 42: 2,6,7factors of 35: 5,7
The GCF is 6.