The factors of 42 are 1, 2, 3, 6, 7, 14, 21 and 42.
The factors of 38 are 1, 2, 19 and 38.
2 is the greatest factor which divides both 38 and 42.
So, the GCF of 42 and 38 is 2.
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The GCF is 2.
The GCF of 38 and 76 is 38. Since 38 is a factor of 76, it is automatically the GCF.
The GCF is 21.
The GCF of 42 and 35 is 7.factors of 42: 2,6,7factors of 35: 5,7
The GCF is 2.