91/100; 93/100; 97/100; т.к. 9/10=90/100, а 1=100/100, аналогично 2) и 3)
2) 33/70; 37/70; 39/70
3) 3/12 <х<4/12; 30/12 <х<40/12;
37/120; 39/120; 31/120
