What is the LCM of 1 and 9?

What's the Least Common Multiple (LCM) of 1 and 9?

Answer

LCM of 1 and 9 is

9

First common multiples: 9, 18, 27, …

1 divides every number: the GCF with 1 is always 1, and the LCM is the other number itself — here 9.

1 — no prime factors

9 = 3²

Prime	1	9	Highest power
3	—	3²	3²

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

LCM = 3² = 9

Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
Multiples of a Number - List the first 10 multiples of any number from 1 to 999

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