17. | How many times do the hands of a clock coincide in a day? | |||||||
Answer: Option C Explanation:
The hands of a clock coincide 11 times in every 12 hours (Since between 11 and 1, they coincide only once, i.e., at 12 o’clock). AM 12:00 PM 12:00 The hands overlap about every 65 minutes, not every 60 minutes.
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18. | How many times in a day, the hands of a clock are straight? | |||||||
Answer: Option C Explanation:
In 12 hours, the hands coincide or are in opposite direction 22 times.
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19. | A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct? | |||||||||||||||||||||||||||||
Answer: Option B Explanation:
Time from 12 p.m. on Monday to 2 p.m. on the following Monday = 7 days 2 hours = 170 hours.
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