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The LCM of 20 and 6 is 60.
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Find least common multiple (LCM) of: 40 & 12 10 & 3 60 & 18 100 & 30 140 & 42 40 & 6 20 & 12 60 & 6 20 & 18 100 & 6 20 & 30 140 & 6 20 & 42
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