What are the common multiples of 9 and 15?

Common multiples of 9 and 15 are numbers that both 9 and 15 can be divided into evenly with no remainder.

To find the common multiples of 9 and 15, we compare the list of multiples of 9 with the list of multiples of 15 to see what they have in common.

To create a list of multiples of 9, we multiply 9 by 1, 9 by 2, and so on like this:

9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
...

Similarly, to create a list of multiples of 15, we multiply 15 by 1, 15 by 2, and so on like this:

15 x 1 = 15
15 x 2 = 30
15 x 3 = 45
15 x 4 = 60
...

When we compare the two lists to see what they have in common, we get the answer to "What are the common multiples of 9 and 15?"

45, 90, 135, 180, etc.

Since 45 is the first number they have in common, 45 is the least common multiple of 9 and 15.

Note: Our lists are shortened because they go on forever, but can you see the pattern when you look at the answer in green above? The common multiples are in intervals of 45 (the least common multiple), so you can continue the green list above with more common multiples of 9 and 15 by simply adding 45 to the last number on the list.

Common Multiples Calculator
Need another answer? Get common multiples here:

What are the common multiples of 9 and 16?
Did you find our explanation and solution to "Common Multiples of 9 and 15" helpful? If so, try the next problem on our list here.