Respuesta :

Easy, just write out the multiple of the numbers.

4: 4,8,12,16,20,24,28,32,36,40,44,48,52,56,60

7: 7,14,21,28,35,42,49,56,63,70 

Etc.

But a few common multiples:

28,56,84,112,140

These are the first 5 common multiples of 4 and 7.