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Factor them.

2 x 3 x 3 x 3 = 54

3 x 3 x 3 x 3 = 81

Select the common factors.

3 x 3 x 3 = 27, the GCF

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11y ago
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Wiki User

7y 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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Wiki User

11y ago

The GCF is 9.

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Wiki User

7y ago

The GCF is 9.

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Q: How do you find the gcf of 81 and 54?
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