40, 80, 120
You need at least two numbers to find something in common.
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.
10, 20, 30.
60,120,180
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.
3 and 7 multiplies to 21 and equals to 10
Because 10 is a multiple of 5.2 x 5 = 10
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
The only common factor is 1.
5 10 15 20 25 30
10, 20, 30
The anser to that Q is 30.