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If you do the LCM of 14 21 and 28 by listing all the factor's you get 84 but if you do prime factorization it comes out 168 Why?
Wiki User
∙ 11y ago
2 x 7 = 14
3 x 7 = 21
2 x 2 x 7 = 28
2 x 2 x 3 x 7 = 84, the LCM
If you got 168, you didn't eliminate the 2 from 14.
Wiki User
∙ 11y ago
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