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The LCM of 1920 and 1620 is 51840.
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Find least common multiple (LCM) of: 3840 & 3240 960 & 810 5760 & 4860 640 & 540 9600 & 8100 384 & 324 3840 & 1620 1920 & 3240 5760 & 1620 1920 & 4860 9600 & 1620 1920 & 8100
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