Question

Find the LCM of the following by prime factorization method.

$9,18$

Answer 1

First, take the prime factor of $9,18$

$9=3\times 3$

$18=2\times 3\times 3$

Select the greatest power of every prime factor.

LCM$=$$2\times 3\times 3$$=18$

Hence, the LCM of $9,18$ will be $18$.