Mathematics · LCM and HCF
Four different electronic devices make a beep after every 30 minutes, 1 hour, 1 hour 30 minutes, and 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. When will they again beep together?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13:30 a.m. (Next day)
- 211:30 a.m. (Next day)
- 310:00 a.m. (Next day)
- 49:00 a.m. (Next day)✓
Correct answer
9:00 a.m. (Next day)
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