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Factoring and Multiples

How does findingthe prime factorization of a group of numbers help you to find the greatest common factor?

Answer

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Wiki User
March 02, 2013 6:28PM

Once you have the prime factorizations, it's easy to spot the factors they have in common.

Example: 30 and 42

2 x 3 x 5 = 30

2 x 3 x 7 = 42

2 x 3 = 6, the GCF