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Answer: 6

Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.

Method:

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 138 are 1, 2, 3, 6, 23, 46, 69, and 138.

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, and 6. Therefore, the greatest common factor is 6.

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14y ago
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13y ago

Greatest common factor of 132 and 180 is 12.

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8y ago

The GCF is 12.

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Q: What is the greatest common factor of 138 and 180?
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