What is the least common multiple of 12 and 20-?

Answer 1

The least common multiple of 12 and 20 is 60.

Multiples of 12 are 12, 24, 36, 48, 60, and so on.

Multiples of 20 are 20, 40, 60, and so on.

Another way to find the LCM:

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

The prime factors of 20 are 2, 2, and 5

The Lowest Common Multiple of two numbers must contain the factors of both of them, but only do so once.

So we need the 2, 2 and 3 from the 12, and as there are already 2 2s we only need to add the 5 from 20.

This means that the LCM will be 2 x 2 x 3 x 5 = 60.
60

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(Better Example)

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

The prime factors of 20 are 2, 2, and 5

The Lowest Common Multiple of two numbers must contain the factors of both of them, but only do so once.

So we need the 2, 2 and 3 from the 12, and as there are already 2 2s we only need to add the 5 from 20.

This means that the LCM will be 2 x 2 x 3 x 5 = 60.

Answer 2

least common multiple for 12 and 20 is 60.

Answer 3

LCM(12, 20) = 60.

Answer 4

It is: 60