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The greatest common factor of 15 and 21 is 3

The factors of 15 are: 1, 3, 5, 15

The factors of 21 are: 1, 3, 7, 21

The common factors are: 1, 3

The Greatest Common Factor (GCF) is: 3

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9y ago

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More answers

The GCF is 3.

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13y ago
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Q: What is the greatest common factors of 15 and 21?
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