well five times two is ten so double five and you have the same multiples
5*2 2*5 10*1 1*10 and yourself 10 time!!! heheheheh
5,10,15,20,25.
the first multiples for 7,12,3,9,4,11,8,5,10,2, the first multiples for 7,12,3,9,4,11,8,5,10,2,
120