A gym has 6 different bells for 6 different exercises which ring at the end of each exercise. The duration of the exercises are 40, 45, 50, 60, 75 and 125 seconds. If the bells ring together at 9 AM, then at what time next will they ring together?
1
11:40 AM
2
11:30 AM
3
10:30 AM
4
10:45 AM