What is the least common factor of 30 and 42?

Answer 1

The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.

However, I suspect that you mean either:

• What is the highest common factor of 30 and 42?

ie what is the highest number that is a factor of both 30 and 42:

hcf = 6;

• What is the lowest common multiple of 30 and 42?

ie that is the smallest number that is a multiple of both 30 and 42

lcm = 210.

Answer 2

1234456

Answer 3

It is: 1