What are the common multiples of 87 and 84?

Common multiples of 87 and 84 are numbers that both 87 and 84 can be divided into evenly with no remainder.

To find the common multiples of 87 and 84, we compare the list of multiples of 87 with the list of multiples of 84 to see what they have in common.

To create a list of multiples of 87, we multiply 87 by 1, 87 by 2, and so on like this:

87 x 1 = 87
87 x 2 = 174
87 x 3 = 261
87 x 4 = 348
...

Similarly, to create a list of multiples of 84, we multiply 84 by 1, 84 by 2, and so on like this:

84 x 1 = 84
84 x 2 = 168
84 x 3 = 252
84 x 4 = 336
...

When we compare the two lists to see what they have in common, we get the answer to "What are the common multiples of 87 and 84?"

2436, 4872, 7308, 9744, etc.

Since 2436 is the first number they have in common, 2436 is the least common multiple of 87 and 84.

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 2436 (the least common multiple), so you can continue the green list above with more common multiples of 87 and 84 by simply adding 2436 to the last number on the list.

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What are the common multiples of 87 and 85?
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