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The LCM of 1200 and 4200 is 8400.
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Find least common multiple (LCM) of: 2400 & 8400 600 & 2100 400 & 1400 240 & 840 2400 & 4200 1200 & 8400 3600 & 4200 6000 & 4200 8400 & 4200
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