0
Anonymous
The GCF of 4, 7, and 28 is 1.The prime factorization of 4 is 2*2.The prime factorization of 7 is 1*7.The prime factorization of 28 is 2*2*7.The have no common factor other than 1, so that is their GCF.
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The GCF of 4, 7, and 28 is 1.