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How do you find the greatest common factor of 42and70?

Anonymous

∙ 15y ago

Updated: 10/17/2024

First you would list all of the factors of each number. The factors of 42 are 1, 2, 21, 3, 14, 6, 7, 42. The factors of 70 are 1, 2, 35, 5, 14, 7, 10. Then you would find out which factors are common between them: 1, 2, 7. The greatest is 7.

Wiki User

∙ 15y ago

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What is the greatest common factor of45 and 75?

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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How do you find the greatest common factor when there are no common factors?

There is always a common factor. If there are no common prime factors, the GCF is 1.

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the greatest common factor is 1 because it's the only factor of 10 that 17 can be divided by without a remainder.

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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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