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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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Wiki User

9y ago

The GCF is 5.

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Anonymous

Lvl 1
4y ago

The gcf of 20, 45 and 55 is 5

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Anonymous

Lvl 1
4y ago

5

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Q: What is the gcf of 45 and 55 and 20?
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