GATE 2022 MA – Question 3
General Aptitude · Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation · 1 mark · Multiple choice
School bells P,Q,R ring every 20,30,50 minutes respectively. All ring at noon. When do they next ring together?
- 5:00 PM
- 5:30 PM
- 6:00 PM
- 6:30 PM
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Show answer and explanation
Correct answer: (A) 5:00 PM
Explanation
LCM(20,30,50)=2²×3×5²=300 minutes=5 hours. Noon plus five hours is **5:00 PM, A**.
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