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24 factors to [2 2 2 3]

40 factors to [2 2 2 5]

Common factors: [2 2 2]

Answer is 8◄

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Q: Find the gcf by finding the prime factorization of 24 and 40?
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What is the gcf of 40 and 60 and 80?

The gcf is the greatest common factor. A way of finding the gcf of three numbers is to find the gcf of the first two and then finding the gcf of that number and the third number. Because of the unique prime factorization theorem, the greatest common factor will be a product of some of the prime factors in either number. The prime factorization of 40 is 2^3 * 5 and the prime factorization of 60 is 2^2 * 3 * 5, so the gcf is going to be what is in both, or, in this case, 2^2 * 5. Th prime factorization of 80 is 2^4 * 5 and so gcf of all three numbers is 2^2 * 5, or 20.


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Prime factorization is the result of expressing a number as the product of its prime factors. It will assist you in finding the GCF and LCM of any given number set.


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If you take all the common prime factors between numbers and multiply them it will give you the gcf.


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The prime factorization of 9 is 32 You need at least two numbers to find a GCF.


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