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Anonymous
The GCF of 18 and 42 is 6.
The GCF of 42 and 56 is 14.
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The greatest common factor of 42 and 56 is 14.
The GCF is 1.
The GCF is 14.
42=2x3x7 56=23x7 so the HCF = 2x7 = 14