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21=3*7

33=3*11

57=3*19

so 3*7*11*19= lcm = 4,389
factoring

21=3*7

33=3*11

57=3*19

so LCM=3*7*11*19=4,389

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โˆ™ 2012-09-21 17:32:58
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Anonymous

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โˆ™ 2020-09-23 21:38:16

4389

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Q: What is the LCM of 21 and 33 and 57?
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