The anser to that Q is 30.
5: 5, 10, 15 9: 9, 18, 27 If you are looking for the lowest common multiple between 5 and 9 it would be 45. By the way multiples are just counting by the number itself. e.g. 5, 10, 15, 20, 25, 30, 35 (just count by fives or if the number was anything else count by that number)
The first five multiples of 5 are 5, 10, 15, 20 and 25. For them to be common, they need to be compared to another set of multiples.
The common multiples of 10 and 16 are 80, 160, 240 and so on.
The first three multiples of 5 are 5, 10, and 15. A multiple of a number is the result of multiplying that number by an integer. In this case, the multiples of 5 are obtained by multiplying 5 by 1, 2, and 3, respectively.
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.
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
60,120,180
10, 20, 30.
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.
The anser to that Q is 30.
30 60 90
10, 20, 30.
They are: 240, 480 and 720
They are: 60 120 and 180
20 30 40
90, 180, 270