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The LCM of 2 and 21 is 42.
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Find least common multiple (LCM) of: 4 & 42 6 & 63 10 & 105 14 & 147 4 & 21 2 & 42 6 & 21 2 & 63 10 & 21 2 & 105 14 & 21 2 & 147
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