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The LCM of 4 and 9 is 36.
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Find least common multiple (LCM) of: 8 & 18 12 & 27 20 & 45 28 & 63 8 & 9 4 & 18 12 & 9 4 & 27 20 & 9 4 & 45 28 & 9 4 & 63
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