What is the greatest common factor of 12 and 18?

1 Answer
sente
Apr 5, 2016

6

Explanation:

12 = 2*2*3

18 = 2*3*3

If we go through the list of primes in each prime factorization, both 12 and 18 have at least one 2 and at least one 3, and those are the greatest numbers of 2s and 3s we can find in both. Thus the greatest common factor of 12 and 18 is 2xx3 = 6

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