What is the lcm of 6 and 9?

The least common multiple (LCM) of two numbers is the smallest number that is a multiple of both numbers.

To find the LCM of 6 and 9, we can list the multiples of each number and find the smallest number that appears in both lists.

Multiples of 6: 6, 12, 18, 24, 30, ...

Multiples of 9: 9, 18, 27, 36, ...

The LCM of 6 and 9 is 18, as it is the smallest number that appears in both lists of multiples.

Therefore, the LCM of 6 and 9 is 18.