How do you find the LCM of 4,30?

Dec 3, 2016

60

Explanation:

List down the prime factors of the numbers. Align any common prime factors

<pre>
4 : 2 * 2
30 : 2 * 5 * 3
</pre>

Align the factors common to the two

<pre>
4 : 2 * 2
30 : 2 * 5 * 3
</pre>

Bring down all the factors, but count factors common to both numbers once only

<pre>
4 : 2 * 2
30 : 2 * 5 * 3

$$ : 2 * 2 * 5 * 3


</pre>

Get the resulting product

<pre>
4 : 2 * 2
30 : 2 * 5 * 3

$$ : 2 * 2 * 5 * 3 = 60


</pre>