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The LCM of 2160 and 1620 is 6480.
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Find least common multiple (LCM) of: 4320 & 3240 1080 & 810 6480 & 4860 720 & 540 432 & 324 4320 & 1620 2160 & 3240 6480 & 1620 2160 & 4860 2160 & 8100
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