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The LCM of 640 and 1980 is 63360.
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Find least common multiple (LCM) of: 1280 & 3960 320 & 990 1920 & 5940 3200 & 9900 128 & 396 1280 & 1980 640 & 3960 1920 & 1980 640 & 5940 3200 & 1980 640 & 9900 4480 & 1980
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