Using prime factorization find the lcm and GCF of 21 and 5

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asked Jul 2, 2017 140k views

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Ibrahim Ahmed · Answer 1 · 2017-07-07T14:27:03+0000

The prime factorization of 21 is: 3 x 7The prime factorization of 5 is: 5Eliminate the duplicate factors of the two lists, then multiply them once with the remaining factors of the lists to get lcm(21,21) = 105

Using prime factorization find the lcm and GCF of 21 and 5

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