No because 3 is not a factor of 43
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No, 42 is a multiple of 3. 3 is a factor of 42.
42
The prime factorization of 42 is 2 x 3 x 7.2 x 3 x 7 = 422 x 3 x 7 = 42
42 = 1 x 42 42 = 2 x 21 42 = 3 x 14 42 = 6 x 7
Since 3 is a factor of 42, it is automatically the GCF.