  # How do you find the greatest common factor of two numbers

To find the greatest common factor of two or more natural numbers, there are 3 methods that can be used - listing out of the common factors, prime factorization, and division method. Each method requires division and multiplication to

• Clear up math
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To find the greatest common factor (GCF) between numbers, take each number and write it's prime factorization. Then, identify the factors common to each number and multiply those

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## How to Find the Greatest Common Factor (GCF)

It is simply the largest of the common factors. In our previous example, the largest of the common factors is 15, so the Greatest Common Factor of 15, 30 and 105 is 15 The Greatest Common Factor is the largest of the common 