15/9.
(6 5 số)
00,01,02,03,04,05,06,07,08,09,10,11,14,15,16,17,19,20,22,23,25,28,29,30,32,37,38,40,41,42,43,44,45,46,50,51,52,53,54,55,56,57,58,59,60,61,64,65,66,67,69,70,71,72,73,75,78,80,82,83,87,90,91,95,96
(3 9 số)
02,04,06,08,14,16,20,22,23,25,28,29,32,38,40,41,42,43,44,45,46,52,54,56,58,60,61,64,65,66,67,69,72,78,80,82,83,87,96