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The LCM of 5 and 21 is 105.
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Find least common multiple (LCM) of: 10 & 42 15 & 63 25 & 105 35 & 147 10 & 21 5 & 42 15 & 21 5 & 63 25 & 21 5 & 105 35 & 21 5 & 147
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