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The LCM of 20 and 23 is 460.
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Find least common multiple (LCM) of: 40 & 46 60 & 69 100 & 115 140 & 161 40 & 23 20 & 46 60 & 23 20 & 69 100 & 23 20 & 115 140 & 23 20 & 161
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