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The LCM of 21 and 320 is 6720.
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Find least common multiple (LCM) of: 42 & 640 63 & 960 105 & 1600 147 & 2240 42 & 320 21 & 640 63 & 320 21 & 960 105 & 320 21 & 1600 147 & 320 21 & 2240
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