What are the common multiples of 9 and 69?

Common multiples of 9 and 69 are numbers that both 9 and 69 can be divided into evenly with no remainder.

To find the common multiples of 9 and 69, we compare the list of multiples of 9 with the list of multiples of 69 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 69, we multiply 69 by 1, 69 by 2, and so on like this:

69 x 1 = 69
69 x 2 = 138
69 x 3 = 207
69 x 4 = 276
...

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 69?"

207, 414, 621, 828, etc.

Since 207 is the first number they have in common, 207 is the least common multiple of 9 and 69.

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 207 (the least common multiple), so you can continue the green list above with more common multiples of 9 and 69 by simply adding 207 to the last number on the list.

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What are the common multiples of 9 and 70?
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