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Greatest common factor of 28 is what?

Updated: 8/17/2019
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13y ago

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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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Q: Greatest common factor of 28 is what?
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