Quantitative Aptitude Ques 1890

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

Options:

A) 10: 30 am

B) 10: 31 am

C) 10: 59 am

D) 11 am

Show Answer

Answer:

Correct Answer: B

Solution:

  • LCM of 60 and 62 = 1860 = 31 min

$ \therefore $ They will beep together at 10: 31 am.

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