The GCF is 2.
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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.
The GCF is 14.The GCF is 14.
It is: 14
The GCF is: 14
Since 14 is a factor of 42, it is automatically the GCF.