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The LCM of 3 and 20 is 60.
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Find least common multiple (LCM) of: 6 & 40 9 & 60 15 & 100 21 & 140 6 & 20 3 & 40 9 & 20 3 & 60 15 & 20 3 & 100 21 & 20 3 & 140
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