Question

100:40 = 40:6= 7:13= 42=3*2*? 70=2*?*530= 12= 3*3*? 15=2*3*?

Answer 1

100:40 = 2,5
40:6=6,66
7:13=0.53
42=3*2*? - 42=3*2*7
70=2*?*5 - 70=2*7*5