How do you find the LCM of 27, 18?

1 Answer
Dec 9, 2016

lcm(18,54)=54lcm(18,54)=54

Explanation:

method 1

list multiples of the two numbers and pick out the common ones.

multiples 18:{18,36,54,72,90,108....}

multiples27:{27,54,81,105,142,....}

lcm(18,54)=54

method 2

use: " "axxb=hcfxxlcm

18xx27=9xxlcm

lcm=(cancel(18)^2xx27)/cancel(9

lcm=2xx27=54