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Q:

Three Alarm make a beep after every 48 sec, 72 sec and 108 sec respectively. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest is

  • 1
    10:07:36 hrs
  • 2
    10:07:24 hrs
  • 3
    10:07:12 hrs
  • 4
    10:07:48 hrs
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Answer : 3. "10:07:12 hrs"

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