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21 The angle between the minute hand and the hour hand of a clock when the time is 10.30 is
22 A clock strikes for every half an hour once and for every hour for the number same as that of the hour. What was the number of strikes given by the clock from 8 hours to 12 hours?
23 A clock gains 10 s in every 3 h. If the clock was set right at 4:00 am on Monday morning, then the time it will indicate on Tuesday evening at 7:00 pm:
24 A watch which gains uniformly, is 5 min slow at 7 o'clock in the morning on Sunday and it is 5 min 48 s fast at 7 pm on following Sunday. Which day was it correct?
25 A watch which gains uniformly is 2 minutes slow at noon on Monday and is 4 min 48 seconds fast at 2 p.m. on the following Monday. When was it correct?
26 A clock is set right at 6 am. The clock losses 16 min in 24 h. What will be true time, if the clock indicates 11 pm on 4th day?
27 The time shown by a clock was 2 o’clock. After a certain time the mirror image shown by the clock was 15 minutes past 7. What is the time lag between the two times?
28 The angle between the hour hand and the minute hand of a clock when the time is 4.55 is:
