What is the LCM of 27 and 81?

What's the Least Common Multiple (LCM) of 27 and 81?

Answer

LCM of 27 and 81 is

81

First common multiples: 81, 162, 243, …

As a common denominator: multiply the top and bottom of x/27 by 3.

27 divides 81 (81 ÷ 27 = 3), so the LCM is the larger number itself.

27 = 3³

81 = 3⁴

Prime	27	81	Highest power
3	3³	3⁴	3⁴

LCM = 3⁴ = 81

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