30
It is: 120
The common multiples of 3,4, and 10 would be all the multiples of 60. 60, 120, 180, 240... all the way to 6000.
30, 60 and 90
Common multiples of 9 and 10 are all of the multiples of 90.
They are: 30, 60 and 90
4, 6 and 10
15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99
5
1 11 10
30, 60, 90
The Lowest Common Multiple (LCM) of 3 and 10 would be 30