Răspuns :
3supra 6
6 supra 15
12 supra 9
21 supra 27
33 supra 39
60 supra 150
117 supra 141
6 supra 15
12 supra 9
21 supra 27
33 supra 39
60 supra 150
117 supra 141
3)1/2=3/6, 3)2/5=6/15, 3)4/3=12/9, 3)7/9=21/27, 3)11/13=33/39, 3)20/50= 60/150, 3)39/47=117/141. Sper ca ai inteles :D