Question

LCM of $81,18$ and $36$ is:

• A. $81$
• B. $162$
• C. $324$
• D. $36$

Answer 1

The correct option is C $324$

The LCM of $81,18$ and $36$ can be found by factorising the given numbers:

So, first factorise the given numbers i.e.

$81=3\times 3\times 3\times 3$

$18=2\times 3\times 3$

$36=2\times 2\times 3\times 3$

So, the LCM is $2\times 2\times 3\times 3\times 3\times 3=324$

Hence, the answer is $324$.