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What is the LCM and the GCF of 18 and 21?

Updated: 9/18/2023

Wiki User

∙ 14y ago

Best Answer

To make this easier, let's first factor 18 and 21 into their prime factors:

18=2*3^2

21=3*7

Now it's very easy to find the LCM and GCF. The LCM is 2*3^2*7=126, and the GCF is 3.

Wiki User

∙ 14y ago

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