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Three bells ring at intervals of 10, 15 and 25 minutes. They ring together at 8:00 AM. At what time will they ring together for the 4th time, counting 8:00 AM as the first?

Competition practiceNumber System, HCF & LCM
  • A6:00 PM
  • B3:30 PM
  • C1:00 PM
  • D4:00 PM

Step-by-Step Solution

min. The 4th time is 3 gaps later: min = 7 h 30 min after 8:00 AM.
Answer: B) 3:30 PM

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