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The LCM of 3 and 6 is 6.
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Find least common multiple (LCM) of: 6 & 12 9 & 18 1 & 2 15 & 30 21 & 42 6 & 6 3 & 12 9 & 6 3 & 18 15 & 6 3 & 30 21 & 6 3 & 42
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