Clocks & Calendars · Question 29 · Hard
Clocks & Calendars question 29
Two clocks are set correctly at 12 noon on Monday. One gains 2 minutes every hour and the other loses 1 minute every hour. When will they first show times that differ by exactly 1 hour?
- 12 noon on Tuesday
- 8 p.m. on Monday
- 8 a.m. on Tuesday
- 4 a.m. on Tuesday
Answer and explanation
Answer: C. 8 a.m. on Tuesday
Explanation: The gap between them grows by 2 + 1 = 3 minutes every hour, so a 60-minute gap takes 20 hours: 12 noon Monday + 20 hours = 8 a.m. Tuesday.
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