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

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

The g. c. f. of 21 and 84 is 21.

Since 21 is a factor of 84, it is automatically the GCF and all of its factors are common.

The greatest common factor is 21.

The GCF is 21.

The GCF is 21.

The GCF of 84 and 105 is 21.The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, and 84.The factors of 105 are 1, 3, 5, 7, 15, 21, 35, and 105.The greatest number they have in common (Hint hint, greatest common factor) is 21.

The common factors of 21 42 and 84 are 21

The Greatest Common Factor of 21, 63, 84: 21

Since 21 is a factor of 84, all of its factors are common.

The factors of 84 are 1,2,3,4,6,7,12,14,21,28,42 and 84. To find a greatest common factor, you need to compare them to another number's factors.

The greatest common factor of 63 , 84 = 21

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