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Anonymous
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It is: 4
The greatest common factor (gcf) of 28 and 36 is 9.
The GCF is 4.
The GCF is 2.
GCF(28, 36) = 4
The GCF of 28, 36 and 52 is 4.
The GCF of 8, 20, and 36 is 4.
The GCF of 20 and 28 is 4