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Answer: 20

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 20 are 1, 2, 4, 5, 10, and 20.

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.

The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

The common factors are 1, 2, 4, 5, 10, and 20. Therefore, the greatest common factor is 20.

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โˆ™ 2015-09-07 04:00:45
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Algebra

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Q: What is the greatest common factor of 20 40 and 60?
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