A clock is set right at 8 a.m. The clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 1 p.m. on the following day? MCQ with Answer and Explanation
A clock is set right at 8 a.m. The clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 1 p.m. on the following day?
A. 48 minutes past 12
B. 45 minutes past 12
C. 46 minutes past 12
D. 47 minutes past 12
Answer: Option A
Solution (By JKSSB Mock Tests)
From 8 a.m. to 1 p.m. next day is 29 hours. The clock gains 10 min in 24 hours, so in 29 hours gains (10/24)×29 = 145/12 ≈12.083 min. When clock shows 29 hours, actual time passed is 29 - 12.083/60 hours ≈28 hours 47.9 min, so true time is about 12:48 p.m. Standard answer is 48 min past 12.
In a certain code language, '123' means 'hot filtered coffee', '356' means 'very hot day' and '145' means 'coffee is hot'. Which digit stands for 'filtered'?
Explanation:
From first and third, hot and coffee common digits 1 and 3 or 5? 123 and 145 share 1. From first and second, hot =3. Thus from first, filtered =2 (coffee is the remaining 1).
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