The highest common factor is 7
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Well, darling, the greatest common factor for 21, 35, and 56 is 7. It's like finding the perfect little black dress that fits all three numbers like a charm. So, go ahead and flaunt that GCF like it's the latest fashion trend.
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The Greatest Common Factor of 42, 56, 98: 14
The GCF is 8.
28 and 56 have a GCF of 28.