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There cannot be a greatest common factor 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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Earn +20 ptsQ: What is the greatest common factor of 18 and 18?
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What is the greatest common factor of 18 and 90?
Since 18 is a factor of 90 and it is the largest factor of itself, the greatest common factor of 18 and 90 is 18.Since 18 is a factor of 90, it is automatically the GCF.
What is the greatest common factor of 18 and 56?
2 is the greatest common factor of 18 and 562
What is the greatest common factor of 72 and 90?
The Greatest Common Factor is 18
What is the greatest common factor of 18 36 and 90?
Greatest common factor of 18 36 and 90 is 18.
What is the greatest common factor of 18 27 and 30?
The Greatest Common Factor of 18, 27, and 30 is 3.
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