Two clocks are set correctly at 12:00 noon. One gains 2 minutes every hour and the other loses 1 minute every hour. What is the difference between their times after 4 hours?
- A.8
- B.10
- C.12 ✓
- D.16
Explanation: After 4 hours, the first clock is 8 minutes ahead and the second is 4 minutes behind — a total difference of 12 minutes.
Class 6 IMO Mathematics Olympiad practice · Data & Measurement · Units, Time & Money
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