In 6 minutes, how many degrees minute hand traverses?
A. 6°
B. 30°
C. 5°
D. 36°
Answer
Correct Answer: D. 36°
Explanation
In a minute, minute hand traverses 6° degree. So in 6 minutes, it traverses 6 X 6° = 36°.
Therefore answer is 36°.
In a minute, how many degrees hour hand traverses?
A. 0.5°
B. 1°
C. 1.5°
D. 3°
Answer
Correct Answer: A. 0.5°
How many times do the hands of a clock are in perpendicular to each other in a day?
A. 22
B. 24
C. 44
D. 48
Answer
Correct Answer: C. 44
How many times in a day, are the hands of the clock straight?
A. 22
B. 44
C. 24
D. 48
Answer
Correct Answer: B. 44
Explanation
It has not been mentioned coinciding or opposite of each other. So, we have to consider a common scenario where the hands are in a straight line that is either opposite or coincides with each other.
How many times in a day, are the hands of a clock in straight line but opposite in direction.
A. 20
B. 22
C. 24
D. 48
Answer
Correct Answer: B. 22
My watch, which gains uniformly, is 2 min and show at noon on Sunday, and is 4 min 48 seconds fast at 2PM on the following Sunday when was it correct?
A. Wednesday noon
B. Sunday 2 PM
C. Monday noon
D. Tuesday 2 PM
Answer
Correct Answer: D. Tuesday 2 PM
Explanation
At noon on Sunday watch gains 2 Minutes.
And at 2 PM on following Sunday it is 4 Minutes 48 Seconds fast.
So, it gains 6 Minutes 48 Seconds i.e. 2 Minutes + 4 Minutes 48 Seconds (total 408 Seconds) in 170 Hours (Hours from Sunday Noon (12 PM) to following Sunday 2 PM)
Therefore, watch gains 120 Seconds (2 Minutes) in 170*120/408 = 50 Hours
50 Hours = 2 Days 2 Hours
Thus, Watch was correct after 2 days 2 hours from Sunday noon that is Tuesday 2 PM.
A clock loses 5 minutes every hour and was set right at 11 AM on a Monday. When will it show the correct time again?
A. 11 AM on Sunday
B. 11 AM on Monday
C. 11 AM on Tuesday
D. 11 AM on Wednesday
Answer
Correct Answer: A. 11 AM on Sunday
Explanation
As mentioned in Key Point O, the faulty clock will show the correct time when it loses or gains 12 Hours.
In the given problem, the clock loses 5 Minutes in an hour. So, 1 Minute lost in every 12 minutes (60 minutes / 5 minutes = 12 minutes).
Now, for losing 12 hours i.e. 720 Minutes(12 X 60 = 720) it will take 720 X 12 = 8640 Minutes = 144 Hours = 6 Days.
So, Clock will show correct time after 6 days from 11 AM Monday.
Thus, Answer is 11 AM on Sunday.
A watch gain 8 seconds in 4 minutes and was set right at 4 AM. What time will it show at 11 PM on the same day?
A. 11:08
B. 12:38
C. 11:38
D. 12:08
Answer
Correct Answer: C. 11:38
Explanation
8 Seconds in 4 Minutes mean 120 Seconds (or 2 Minutes) in one hour.
From 4AM to 11PM (on the same day) = 19 hours
So, total seconds gain in 19 hours = 19 X 120 (Seconds gain per hour) = 2280 Seconds.
Now, 2280 Seconds = 38 Minutes (i.e. 2280/19 = 38)
Thus incorrect clock will show 11:38PM at 11PM.
If real time is 12:10 then what will be mirror image of that clock?
A. 10:50
B. 11:50
C. 12:50
D. 1:50
Answer
Correct Answer: B. 11:50
Explanation
Shortcut is to subtract the given time from 11:60 (As mentioned in key Point N). Thus the correct time is 11:60 – 00:10 = 11:50 because 12:10 mean 00:10.
A clock when seen in a mirror shows 11:25. What is the correct time?
A. 1:25
B. 12:35
C. 1:35
D. 12:25
Answer
Correct Answer: B. 12:35
Explanation
Shortcut is to subtract the given time from 11:60 (As mentioned in key Point N). Thus the correct time is 11:60 – 11:25 = 0:35 and 0:35 mean 12:35 So, Answer is 12:35.