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The Least Common Multiple (LCM) of 9 and 15 is 45.

Multiples of 9 are 9, 18, 27, 36, 45, 54 and so on.

Multiples of 15 are 15, 30, 45, 60 and so on.

The LCM is the first number to appear on both lists.
45

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7y ago

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