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The GCF of 84 and 180 is 12.

One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.

The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84.

The factors of 180 are 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, and 180.

The common factors are 1, 2, 3, 4, 6, and 12. Therefore, the greatest common factor is 12.

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Q: What is the greatest common factor of 84 and 180?
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