Question

What is the lowest common multiple of 9, 12 , 15

Answer 1

36 is the LCM

Explanation:

9:9,18,27,36_,45,54,63,72,...12:12,24,36_,48,60,72,... 36 is the first number that occurs in both lists. So 36 is the LCM.

Answer 2

Explanation:

9: 3 * 3

12: 2 * 2 * 3

15: 5 * 3

The lowest common multiple has two 2s, two 3s, and one 5.

2*2*3*3*5 = 180