The least common multiple of 6 and 18 is the smallest number that is a multiple of both numbers, which is 18 (Option B).
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 18, we can list the multiples of each number:
- Multiples of 6: 6, 12, 18, 24, 30, 36, ...
- Multiples of 18: 18, 36, 54, 72, ...
We look for the smallest multiple that appears in both lists, which is 18. Thus, the least common multiple of 6 and 18 is 18, making the answer B) 18.