How do you find the LCM of 4,30?
1 Answer
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>
