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The LCM of 20 and 80 is 80.
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Find least common multiple (LCM) of: 40 & 160 10 & 40 60 & 240 100 & 400 4 & 16 140 & 560 40 & 80 20 & 160 60 & 80 20 & 240 100 & 80 20 & 400 140 & 80 20 & 560
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