What is the LCM of 9 and 18?

What's the Least Common Multiple (LCM) of 9 and 18?

Answer

LCM of 9 and 18 is

18

First common multiples: 18, 36, 54, …

As a common denominator: multiply the top and bottom of x/9 by 2.

9 divides 18 (18 ÷ 9 = 2), so the LCM is the larger number itself.

9 = 3²

18 = 2 × 3²

Prime	9	18	Highest power
2	—	2	2
3	3²	3²	3²

— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.

LCM = 2 × 3² = 18

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Multiples of a Number - List the first 10 multiples of any number from 1 to 999

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