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The LCM of 9 and 12 is: 36

To determine the least common multiple of two numbers, determine the prime factors of both numbers. Then, determine the prime factors they have in common. Multiply all their prime factors together (in other words, multiply both numbers together) and divide by the prime factors they have in common (in other words, their greatest common factor).

The prime factors of 9 are 3 and 3.

The prime factors of 12 are 2, 2, and 3.

The prime factors in common are a single 3, the greatest common factor is 3.
36: 4 x 9, 3 x 12.
The least common multiple of 12 , 9 = 36.
36
36

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8y ago

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