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The factors of 6 are:

1, 2, 3, 6

The factors of 18 are:

1, 2, 3, 6, 9, 18

The factors of 72 are:

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

The common factors are:

1, 2, 3, 6

The Greatest Common Factor (GCF) is:

6

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11y ago
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11y ago

6: 2 x 3

15: 3 x 5

18: 2 x 3 x 3

GCF = 3

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Wiki User

6y ago

The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.

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8y ago

The GCF is 3.

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8y ago

The GCF is 6.

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8y ago

The GCF is 18.

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8y ago

The GCF is 2.

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Wiki User

6y ago

The GCF is 9.

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Q: What is the gcf of 18 54 72?
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