Question

What is the lcm of 6 and 5?

Answer 1

Answer: 30

Explanation: 6 factors as 3 × 2 and 5 doesn't factor. When finding the least common multiple, we're looking for factors that match up and here we have no factors that match up. This means that our least common multiple or lcm is simply 3 × 2 × 5 or 6 × 5 which is 30.

Answer 2

List out the multiples.

5: 5, 10, 15, 20, 25, 30
6: 6, 12, 18, 24, 30

30 is the LCM of 5 and 6.