SSC Government Jobs Exams Numerical Ability LCM and HCF

An electronic device makes a beep after every 60 sec. Another device makes a beep after every 62 sec. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest, is

10:28 am
10:30 am
10:31 am
None of above

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SSC Other Question
Average of all prime numbers between 30 to 50

37
37.8
39
39.8
 If LCM of two number is 693, HCF of two numbers is 11 and one number is 99, then find other

34
77
12
45