What is the least common multiple of 18 and 9-?

Answer 1

The least common multiple of 9 and 18 is 18. Because 18 is a multiple of 9, it is automatically the LCM.

You can also find the LCM of a pair of numbers by dividing their product by their GCF.

The product of 9 and 18 is 162.

The GCF of 9 and 18 is 9. (Because 9 is a factor of 18, it is automatically the greatest common factor of the pair.)

So the least common multiple of 9 and 18 is 162/9 = 18.

Another strategy for finding the LCM is listing the multiples of each number, then finding the lowest multiple that is in both lists.

The multiples of 9 are 9, 18, 27, and so on.

The multiples of 18 are 18, 36, 54, and so on.

So the LCM of 9 and 18 is 18.

Answer 2

Since 18 is a multiple of 9, it is automatically the LCM.

Answer 3

The LCM is 18.

Answer 4

18