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Q: What are the common factors of 21 77 and 84?

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The common factors of 21 42 and 84 are 21

HCF(21, 77, 84) = 7.

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

1 and 7.

Their factors are: 77: 1, 7, 11, 77 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

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

The GCF is 7.

The factors of 77 are:1, 7, 11, 77The factors of 84 are:1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84The common factors are:1, 7The Greatest Common Factor (GCF) is:7

The factors of 49 are: 1, 7, 49 The factors of 77 are: 1, 7, 11, 77 The factors of 84 are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

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

It is: 7

It is 7

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