10, 20, 30,...
To get the multiples, multiply 10 by 1, 2, 3, 4, 5,...
The first three multiples of 10 are 10, 20 and 30. Since numbers don't stop, there are no last three.
10, 20, 30 The common multiples of 5 and 10 are multiples of their lowest common multiple. The lcm of 5 and 10, is 10. Thus the first three common multiples are 10, 20, 30.
If half of the sum is 90 then the full sum must be 180. The three consecutive multiples of 10 which add up to 180 are 50, 60 and 70.
10, 20, 30
10, 20, 30.
60,120,180
All the common multiples of a set of numbers are the multiples of their lowest common multiple: lcm(5, 8, 10) = 40 → first three common multiples are 40, 80, 120
10, 20 and 30.
30, 60, and 90
10 of them.
90, 180, 270.
2 8 12