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The LCM of 3990 and 1680 is 31920.
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Find least common multiple (LCM) of: 7980 & 3360 1995 & 840 1330 & 560 798 & 336 570 & 240 7980 & 1680 3990 & 3360 3990 & 5040 3990 & 8400
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