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Anonymous
The GCF is 7.
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The GCF is 1.
Type your answer here... the gcf would be 7
The factors of 21 are: 1, 3, 7, 21. The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56.
The GFC= 2 :)LOL