Hi there,
please see below for solution steps :
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<u> Key moment to solving this problem</u> :
- the LCM stands for least common multiple
Okay. Now, what is the lcm of 3 and 81?
One way to find the lcm is : list several multiples of each number.
However, it's not a really efficient way, because listing all the multiples of 3 until we get to 81 is time-consuming!
So we can ask ourselves one question : <em>Is 81 divisible by 3?</em>
Sure! with this in mind, let's ask ourselves another question : <em>what is the lcm of 81 and 3?</em>
The answer to that is
.
Hope the answer - and explanation - made sense to you,
happy studying !! 