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The GCF is 3.

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7y ago
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7y ago

GCF(12, 21) = 3.

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Q: What is the gcf 12 and 21?
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Gcf of 12 and 15 and 21?

The GCF is 3.


What is the gcf of 12 and 21 and16?

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If you want the "greatest", then there can only be one of it.You can't have two different numbers and say that they'reboth the "greatest".The greatest common factor of 12 and 21 is 3 .


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