An electronic device makes a beep after every 60 seconds. Another device makes a beep after every 62 seconds. They beeped together at 10.00 a.m. The next time when they would beep together at the earliest one is:
1
10.30 a.m.
2
10.31 a.m.
3
10.59 a.m.
4
11.00 a.m.