Mathematics · Number System
The traffic lights at three different road crossings change after every 60 seconds, 90 seconds and 120 seconds respectively. If they all change together at 7:00 a.m., at what time will they again change together for the first time?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17:12 a.m.
- 27:06 a.m.✓
- 37:08 a.m.
- 47:10 a.m.
Correct answer
7:06 a.m.
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