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The LCM of 8 and 21 is 168.
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Find least common multiple (LCM) of: 16 & 42 24 & 63 40 & 105 56 & 147 16 & 21 8 & 42 24 & 21 8 & 63 40 & 21 8 & 105 56 & 21 8 & 147
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