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Q: What are the common factors and greatest common factor of 21 and 84?

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The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.

The greatest common factor is 3

The greatest common factor of 21 and 40 is 1 because there are no larger common factors.

There is neither a greatest common factor nor common factors of a single number, such as 21, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 21 are 1, 3, 7, and 21.

the greatest common factor of 8 21 and 75 is 1.

The greatest common factor of 15 and 21 is 3The factors of 15 are: 1, 3, 5, 15The factors of 21 are: 1, 3, 7, 21The common factors are: 1, 3The Greatest Common Factor (GCF) is: 3

The greatest common factor is 21.

The Greatest Common Factor (GCF) is: 7

The Greatest Common Factor (GCF) is: 3

The Greatest Common Factor (GCF) is: 1

The Greatest Common Factor (GCF) is: 7

The factors of 14 are: 1, 2, 7, 14.The factors of 21 are: 1, 3, 7, 21.The Greatest Common Factor (GCF) is: 7.

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