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The GCF of 21 and 84 is 21. Since 21 is a factor of 84, it is automatically the GCF.

It is: 21

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21, because the prime factorization of 84 is 2 x 2 x 3 x 7. The prime factorization of 21 is 3 x 7. The factors that both 84 and 21 have in common are 3 and 7, so 3 x 7=21.

21.

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

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The Greatest Common Factor (GCF) is: 4

The greatest common factor of the numbers 144 and 84 is 12.

6

HCF(21, 77, 84) = 7.

The GCF is 2.

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The Greatest Common Factor (GCF) is: 21

Since 21 is a factor of 84, it is automatically the GCF.

Since 21 is a factor of 84, it is automatically the GCF.

No

The greatest common factor of the numbers 21 and 84 is 21.

Since 21 is a factor of 84, it is automatically the GCF of this problem.