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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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7y ago

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9y ago

The GCF of 21, 27, and 45 is 3

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12y ago

The GCF is: 1

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Wiki User

9y ago

The GCF is 9.

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Q: What is the greatest common factor of 27 and 45 and 90?
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