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Factor them.
2 x 2 x 2 x 2 x 3 = 48
2 x 2 x 3 x 7 = 84
Select the common factors.
2 x 2 x 3 = 12, the GCF.
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.
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.
There is always a common factor. If there are no common prime factors, the GCF is 1.
the greatest common factor is 1 because it's the only factor of 10 that 17 can be divided by without a remainder.
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.