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What is the greatest common factor of 21 42 and 49?

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Anonymous

∙ 10y ago
Updated: 8/21/2019

It is: 7

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Wiki User

∙ 10y ago
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What are the common factors and greatest common factor of 21 and 42?

The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.


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21 itself is the greatest common integral factor, since 21 X 2 = 42.


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7 is the greatest common factor of 4942 and 21, or of 49, 42 and 21, if that is what you meant.


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