What is the least common multiple of 3 and 12?

Answer 1

The least common multiple (LCM) of 3 and 12 is 12. Because 12 is a factor of 3, it is automatically the LCM of the set.

You can also find the LCM by listing the multiples of each number in the set, and finding the lowest one in each list.

The multiples of 3 are 3, 6, 9, 12, and so on.

The multiples of 12 are 12, 24, and so on.

So the LCM is 12.

Another method is dividing the product of the pair of numbers by their GCF.

The product of 3 and 12 is 36.

The GCF of 3 and 12 is 3. (Since 3 is a factor of 12, it is automatically the GCF of the set).

So the LCM is 36/3 = 12.

The least common multiple is the smallest number that all the numbers are a factor of. In this case it's 12. This is because 12x1=12 and 3x4=12.
The LCM is 12.

Answer 2

12

Answer 3

15