# How do you find the least common number to multiply?

##### 1 Answer
Jan 9, 2015

One method is L division

LCM can be found using this technique where you divide the numbers using common divisors. For e.g If you need LCM for 2,3,4,5 then you can get that by
$2 \lfloor 2 , 3 , 4 , 5$

$\lfloor 1 , 3 , 2 , 5$
As all of the reminders are prime numbers you multiply them along with the number you used in division. i.e. $L C M = 2 \cdot 1 \cdot 3 \cdot 2 \cdot 5$.
Which is $L C M = 60$. Similarly you can do the same for any number. One of the other method is to multiply all the numbers and divide by GCD. But finding GCD also uses the above method.