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What's the greatest common factor of 56 and 21?
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What's the greatest common factor of 56 and 21?

User Rmbits
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The GCF of 56 and 21 is: 7

Factors of 21: 1, 3, 7, 21
Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56

7 is the highest common factor that appears in both of the given numbers.
User Dragonmnl
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