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The least common multiple of the numbers 7, 18 and 21 is 126.
The least common multiple of the numbers 7, 21 and 18 is 126.
The LCM is 42
2 x 3 x 3 = 18 3 x 7 = 21 2 x 3 x 3 x 7 = 126, the LCM