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To find LCM, prime factor each number

15 = 3 * 5

20 = 2 * 2 * 5

30 = 2 * 3 * 5

Now put enough of those factors together so you can include each number in your list.

You need 2 * 2 * 3 * 5, or 60, to do the job. so LCM is 60.
60

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โˆ™ 2015-08-12 01:53:47
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โˆ™ 2014-10-19 12:33:28

The least common multiple of the numbers 20, 30 and 15 is 60.

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โˆ™ 2012-09-24 13:07:00

The LCM is: 60

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โˆ™ 2014-01-21 04:44:13

60

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Q: What is the least common multiple of 15 and 30 and 20?
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