7
As a note: if one of the numbers in a GCF problem is a prime number, then the answer must be either 1 or that Prime number. In this case, the other two are both divisible by 7 so it's the prime rather than 1.
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The GCF is 7.
LCM = 70 GCF = 7
The factors of 14 are: 1, 2, 7, 14The factors of 28 are: 1, 2, 4, 7, 14, 28The factors of 35 are: 1, 5, 7, 35The common factors are: 1, 7The Greatest Common Factor (GCF) is: 7
The GCF of 42 and 35 is 7.factors of 42: 2,6,7factors of 35: 5,7
The GCF is 7.