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
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.
The anser to that Q is 30.
30 60 90
20, 40, 60
20 30 40