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The greatest common factor of 10, 15, and 20 is 5.

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 both numbers have in common.

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 10 are 1, 2, 5, and 10.

The factors of 15 are 1, 3, 5, and 15.

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

The common factors are 1 and 5. Therefore, the greatest common factor is 5.
If you mean: 10, 15 and 20 then it is 5 that is the greatest common factor

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Wiki User

6y ago
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Valerie Pacheco

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3y ago

It is 10-1,2,5,10

15-1,3,5,15

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Wiki User

9y ago

1 and 5, the GCF.

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Wiki User

8y ago

The GCF is 5.

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Wiki User

9y ago

GCF(15, 10, 20) = 5.

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cutie pie

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3y ago

5

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Anonymous

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3y ago

5

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Q: What is the greatest common factor of 10 15 and 20?
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What is the greatest common factor of 10 10 and 15?

The greatest common factor of 10 and 15 is 5.One way to determine the greatest common factor is to find all the factors of the numbers and compare them.The factors of 10 are 1, 2, 5, and 10.The factors of 15 are 1, 3, 5, and 15.The common factors are 1 and 5, so 5 is the greatest common factor.The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.The prime factors of 10 are 2 and 5.The prime factors of 15 are 3 and 5.The prime factors in common are a single 5, so the greatest common factor is 5.The GCF is 5.The GCF is 5.