How do you find the LCM of 15, 6?

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Answer 1 · 2016-12-04T08:00:16

30

Get the prime factors of both numbers

15: 3 * 5
6 : 3 *2

Align the common factors and isolate the distinct ones

15: 3 * 5
6 : 3        * 2

Collate the listed factors. Count the common ones, once only

15: 3 * 5
6 : 3        * 2 
-------------------
   : 3 * 5 * 2

Get the resulting product of the collated factors

$3 \cdot 5 \cdot 2 = 30$ $3 * 5 * 2 = 30$