Since 3 is a factor of 15, the first three common multiples of 3 and 15 are 15, 30, and 45.
15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.
15, 30, 45
15, 30, and 45 are.
60, 120, 180
30 60 90
60, 120, 180
45, 90, 135
Multiply 35 by the first three counting numbers. That will give you the first three multiples. To be common, they need to be compared to another set of multiples. If you meant 3 and 5, the LCM is 15. Multiplying 15 by 2 and 3 will give you the others.
60, 120 and 180
105, 210, 315
To start with the 3 common multiples of 5 they are........10,15,and 25the 3 common multiples of 3 are.........15,30,and 45hope this helped=)