it is 7
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28 is a factor of 56, and 28 is also a factor of itself. So the highest common factor of 28 and 56 is 28.
both numbers have a common factor of 7 divide each by 7: 21/28 = 3/4
The greatest common factor of 28 and 20 is 4.
The greatest common factor of 14, 28, and 70 is 14.
The factors of 28 are: 1, 2, 4, 7, 14, 28The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42The factors of 63 are: 1, 3, 7, 9, 21, 63The common factors are: 1, 7The Greatest Common Factor (GCF) is: 7The GCF is: 7The GCF is 7.