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The LCM of 10 and 21 is 210.
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Find least common multiple (LCM) of: 20 & 42 30 & 63 50 & 105 70 & 147 20 & 21 10 & 42 30 & 21 10 & 63 50 & 21 10 & 105 70 & 21 10 & 147
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