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

The factors of 27 are: 1, 3, 9, 27

The common factors are: 1, 3

The Greatest Common Factor (GCF) is: 3

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โˆ™ 2011-02-10 16:49:28
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Q: What is the common factor and the greatest common factor of 21 and 27?
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