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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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Related Questions
What is the GCF of 15 and 90?
The GCF of 15 and 90 is 15.
What is the GCF of 10 15 60?
Since 15 is a factor of 60, it is automatically the GCF.
What is the GCF of 15 and 135?
The GCF is 15.
What is the gcf of 60 15 30?
The GCF is 15.
What is the greatest common factor of 30 and 45 and 15?
The GCF for 15 30 45 is 15.The GCF is 15.It is: 15
What is the GCF of 15 and 15?
The GCF is 15.
What is the gcf of 15 and 225?
The GCF is 15.
What is the GCF of 75 and 60?
The GCF is 15.
What is the GCF of 60 and 15?
gcf of 60 and 15 is 15.
What is the GCF of 45and60?
The GCF is 15.
The GCF of 15 and 75?
The GCF is: 15
What is the gcf of 3045 and 15?
The GCF is 15.
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