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  1. A clock gains 10 minutes in every 24 hours. It is set right on Monday at 8 am. What will be the correct time on the following Wednesday, when the watch indicates 6 pm?
    1. 5 : 36 pm.
    2. 5 : 40 pm.
    3. 4 : 36 pm.
    4. None of these
Correct Option: A

We can say that ,
Total number of hours from Monday at 8 am to the following Wednesday at 6 pm = 24 × 2 + 10 = 58 hours
24 hours 10 minutes of this clock are the same as 24 hours of a correct clock.

145hours of the incorrect clock = 24 hours of correct clock.
6
∴ 1 hours of the incorrect clock = 24 x 6 hours of correct clock
145
⇒ 58 hours of the incorrect clock = 24 x 6x 58 hours of correct clock
145
58 hours of the incorrect clock = 573hours of correct clock
5

Thus, the correct time on the following Wednesday will be 5 : 36 pm.



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