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The LCM of 3, 8, and 18 is 72.

The multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, and so on.

The multiples of 8 are 8, 16, 24, 32, 40, 48, 56, 64, 72, and so on.

The multiples of 18 are 18, 36, 54, 72, and so on.

So the least common multiple of 3, 8, and 18 is 72.
It is 72

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8y ago

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