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There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.

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The Greatest Common Factor (GCF) of 352 and 542 is 2

You need at least two numbers to find a GCF.

You must have at least two whole numbers to determine a greatest common factor.

You need at least two numbers to find a GCF. If that's 28 and 32, the GCF is 4.

Two or more numbers are normally needed in order to find the GCF of them.

Q: What is the greates common factor of 3657?

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What is the Greatest common factor of 21 and 84

the greatest common factor is 10

It is: 10

The GCF is 7.

The GCF is 3.

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What is the Greatest common factor of 21 and 84

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The Greatest Common Factor (GCF) is: 6

the greatest common factor is 10

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The GCF is 17.

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