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52 = 4 x 13 = 22 x 13

81 = 9 x 9 = 34

Since 52 and 81 do not have any common prime factor, then 52 x 81 = 4,212 is their LCM. So that the other multiples they have in common are all the multiples of 4,212.

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Q: What multiples do 52 and 81 have in common?

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The greatest common factor of 52 and 81 is 1

They are all multiples of 9. Their common multiples are 405, 810, 1215 and so on.

1, 9, and 81 are the only multiples of 81

Because 9 is a multiple of 3, the common multiples of 3 and 9 are the multiples of 9. The first 10 common multiples of 3 and 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, and 90.

To find its multiples!To find its multiples!To find its multiples!To find its multiples!

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They are all multiples of 9. Their common multiples are 405, 810, 1215 and so on.

1, 9, and 81 are the only multiples of 81

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