3, 6, 9, 12.
They are: 36, 72, 108.
20, 40 and 60
20, 40, 60.
40, 80, 120
What are the first three common multiples of four and five
20, 40, 60
6,12,18,26 they are the first four multiples of six
They are multiples of 60.
The first three multiples of 99.
They are the first three multiples of LCM(5, 9), that is, the first three multiples of 45.
12, 24, 36
12, 24, 36, and the fourth one is 48