A clock gains 5 minutes every hour. It is set right at 6 a.m. What is the true time when the clock shows 7 p.m. the same day?
Correct answer A. 6 p.m.
Explanation
The clock shows 65 minutes for every 60 true minutes. It has shown 13 hours = 780 minutes, so true elapsed time = 780 × 60/65 = 720 minutes = 12 hours, giving 6 p.m.
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