Question

I need help to find the lcm of 81 and 3

Answer 1

Hi there,

please see below for solution steps :

________

`\ast` Key moment to solving this problem :

• 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 : Is 81 divisible by 3?

Sure! with this in mind, let's ask ourselves another question : what is the lcm of 81 and 3?

The answer to that is
`\boldsymbol{81}`.

Hope the answer - and explanation - made sense to you,

happy studying !!
`\bold{Frozen \ melody}`

Answer 2

81 is the LCM of 81 and 3

Explanation:

81 is the smallest (least) number that both (common) 81 and 3 "go into" (multiple)

81 goes into 81.

3 goes into 81.

81 is the smallest number that they both go into.