Answer:
20
Explanation:
Hi there,
To find the least common multiple (LCM) of 2 numbers, I would recommend listing off a few multiples of each number. Since they are small, it shouldn't be too hard.
Multiples of 4:
4, 8, 12, 16, 20
Multiples of 5:
5, 10, 15, 20
As you can see, the first multiple that 4 and 5 both share is 20. So the least common multiple of 4 and 5 20.