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The greatest common factor of 21 and 33 is 3.

The factors of 21 are 1,3,7,21 and the factors of 33 are 1,3,11 and 33 so the GCF is 3

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9y ago

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More answers

The GCF is 3.

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Wiki User

9y ago
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3 is.

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Wiki User

12y ago
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Q: What is the greatest common factor of 21 and 33?
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