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The factor tree finds the prime factorization. The prime factorization finds the LCM.

Example: 30 and 42

Factor them.

30

15,2

5,3,2

42

21,2

7,3,2

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Select the highest amount of each factor.

2 x 3 x 5 x 7 = 210, the LCM

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โˆ™ 2014-10-01 03:44:09
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Q: How do you find the LCM with a factor tree?
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