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The LCM of 20 and 40 is 40.
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Find least common multiple (LCM) of: 40 & 80 10 & 20 60 & 120 100 & 200 4 & 8 140 & 280 40 & 40 20 & 80 60 & 40 20 & 120 100 & 40 20 & 200 140 & 40 20 & 280
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