A digital watch X beeps every 30 seconds while watch Y beeps every 32 seconds. They beeped together at 10 AM.
The immediate next time that they will beep together is ______.

11:00 AM

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10:08 AM

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10:42 AM

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10:00 PM

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Solution

The correct option is B 10:08 AM
LCM of (30 and 32) is 480
480 seconds = 8 minutes

Hence, time will be 10:08 AM when they will beep together.

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