The factors of 33 are: 1, 3, 11, 33
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
The common factors are: 1, 3
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The factors of 165 are:1, 3, 5, 11, 15, 33, 55, 165The factors of 231 are:1, 3, 7, 11, 21, 33, 77, 231The common factors are:1, 3, 11, 33The Greatest Common Factor (GCF) is:33
The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
The GCF is 42.
2 x 3 x 7 = 42 3 x 3 x 7 = 6 33 x 7 = 21, the GCF
The GCF is 1.