What are the common multiples of 63 and 39?

Common multiples of 63 and 39 are numbers that both 63 and 39 can be divided into evenly with no remainder.

To find the common multiples of 63 and 39, we compare the list of multiples of 63 with the list of multiples of 39 to see what they have in common.

To create a list of multiples of 63, we multiply 63 by 1, 63 by 2, and so on like this:

63 x 1 = 63
63 x 2 = 126
63 x 3 = 189
63 x 4 = 252
...

Similarly, to create a list of multiples of 39, we multiply 39 by 1, 39 by 2, and so on like this:

39 x 1 = 39
39 x 2 = 78
39 x 3 = 117
39 x 4 = 156
...

When we compare the two lists to see what they have in common, we get the answer to "What are the common multiples of 63 and 39?"

819, 1638, 2457, 3276, etc.

Since 819 is the first number they have in common, 819 is the least common multiple of 63 and 39.

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 819 (the least common multiple), so you can continue the green list above with more common multiples of 63 and 39 by simply adding 819 to the last number on the list.

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What are the common multiples of 63 and 40?
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