2, 3 si 4.
Va rog, urgent, dau coronița!

2. 2/3*60min= 40
4/10*60min= 24
3/5*60min = 36
5/6*60min= 50
3/4*60min= 45
3. 5/8*48= 30
5/8*24= 15
5/8*104= 65
5/8*352= 220
4. 2/7*x=18
2x=126/:2
x=63