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

Updated: 8/20/2019

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## A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Q: What is the greatest common factor of 21and 42?
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The GCF is 21.

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The greatest common factor of 42 and 12 is 6.

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The Greatest Common Factor (GCF) is: 6The greatest common factor of 42 and 102 is 6.

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The greatest common factor of 16 and 42 is 2.

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Since 3 is a factor of 42, it is automatically the GCF.

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