Answer:
18
Explanation:
To find the least common multiple (LCM) of 6 and 9, we can list their multiples and find the smallest multiple they have in common:
Multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, ...
Multiples of 9: 9, 18, 27, 36, 45, 54, ...
We can see that 18 is the smallest multiple that both 6 and 9 have in common, so the LCM of 6 and 9 is 18. Therefore, the answer is 18.