Question

List all the common multiples of 9,12 and 15 between 1 and 100

Answer 1

There is no common multiple of 9, 12 and 15 between 1 and 100

Explanation:

The common multiples of 9, 12 and 15 between 1 and 100

Fist the lowest common multiple

9 = 3 * 3

12 = 3 * 4

15 = 3 * 5

Hence the lowest common multiple

= 3 * 3 * 4 * 5

= 180

Since the lowest common multiple of 9, 12 and 15 is greater than 100, it means that there is no common multiple of these numbers between 1 and 100