Multiple Choice Questions on An electronic device makes a beep after every 60 sec Another device makes a beep after every 62 sec ........... for CAPF (AC) Exam Preparation

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Multiple Choice Questions

An electronic device makes a beep after every 60 sec Another device makes a beep after every 62 sec ...........

Quantitative Aptitude( Paper-I ) LCM, HCF
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    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

    Incorrect Answer

    10:30 am

    Incorrect Answer

    10:31 am

    Correct Answer

    None of above

    Incorrect Answer
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    Explanation:

    L.C.M. of 60 and 62 seconds is 1860 seconds
    1860/60 = 31 minutes
    They will beep together at 10:31 a.m.
    Sometimes questions on red lights blinking comes in exam,

    which can be solved in the same way.

    Hence, option 3 is the correct answer.

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