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Sample paper - 2021 Basic (goprep)
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Q27 of 180 Page 1

An electric device makes a beep after every 60 seconds. Another device makes a beep after every 62 seconds. They beeped together at 11:00 AM. At what time will they beep together again?

We need to find LCM of 60 and 62.


LCM (60, 62) = 1860 sec = 31 min [1 min = 60 sec]


∴ They will beep together again at = 11:00 AM + 31 min = 11:31 AM.


Hence, correct answer is 11:31 AM


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Questions · 180
Sample paper - 2021 Basic (goprep)
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