The least common multiple is 20. Any multiples of 20 will be common multiples of 4 and 10: 40, 60, 80, etc.
They are 20 and all the multiples of 20.
20
5
the LCM is 20
140
180
No, they are just multiples of 2.
20 pinkgal333:20, 40, 60 are all common multiples.
20 is the smallest common multiple of 4, 5, and 10, and thus the first. Thus, the first three common multiples of 4, 5, and 10 are 20, 40 and 60.
Common multiples of 9 and 10 are all of the multiples of 90.
The common multiples of 3,4, and 10 would be all the multiples of 60. 60, 120, 180, 240... all the way to 6000.
20, 40, 60 and so on.