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LCM and HCF Practice Test 1

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Question : 1

Total: 40

The traffic lights at three different signals change after 30 seconds, 45 seconds and 60 seconds respectively. If they all change simultaneously at 11:27 am, then at what time will they again change simultaneously?

11:30 am
12:03 pm
11:42 am
12:00 noon
None of these

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