Three bells ring at intervals of 12, 18 and 30 minutes. If they ring together at 9:00 a.m., when will they next ring together?

A. 12:30 p.m.

B. 12:00 noon

C. 10:30 a.m.

D. 11:00 a.m.

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc cpo Save WhatsApp Report

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Answer: B. 12:00 noon

Answer: (B) 12:00 noon

LCM(12, 18, 30) = 180 minutes = 3 hours. 9:00 a.m. + 3 h = 12:00 noon.

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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