type 5 comparing clocks Practice Questions Answers Test with Solutions & More Shortcuts
clocks PRACTICE TEST [5 - EXERCISES]
type 1 angle between the hands of clock
type 2 position of hands of the clock
type 3 faulty clock
type 4 time gained or lost by clock
type 5 comparing clocks
Question : 1 [D.M.R.C. (CRA) 2016]
There are two clocks, both set to show 10 pm on 21st January 2010. One clock gains 2 minutes in an hour and the other clock loses 5 minutes in an hour. Then by how many minutes do the two clocks differ at 4 pm on 22nd January 2010?
a) 126 minutes
b) 136 minutes
c) 96 minutes
d) 106 minutes
Answer »Answer: (a)
One clock show 10 pm.
On 21st January 2010 one clock gains = 2 minutes
Other clock loses = 5 minutes
Time period between 10 pm and 4 pm = 18 hours
Therefore, Required difference = (2 × 18 + 5 × 18) minutes = 126 minutes
Question : 2 [S.S.C. (FCI) Gr. III 2012]
Wall clock gains 2 minutes in 12 hours, while a table clock loses 2 minutes every 36 hours. Both are set right at 12 noon on Tuesday. The correct time when both show the same time next would be
a) 12:30 at night, after 130 days
b) 12 noon, after 135 days
c) 12 midnight after 135 days
d) 1:30 at nights, after 130 days
Answer »Answer: (b)
After 12 days, i.e., after 12 × 24 hours clock A will gain 48 minutes and will show 12:48 noon.
After 12 days, i.e., after 12 × 24 hours clock B will lose 16 minutes and will show 11:44 am.
The two clocks will show the same time after 135 days The time difference has to be 12 hours between then = 720 minutes.
A will gain 540 minutes in 135 days. B will lose 180 minutes in 135 days Total 720 minutes.
Further if we consider only time then the problem becomes simpler Total difference of minutes between the times shown by the clocks after 36 hours = $16/3$ minutes difference in 1 day = 12 × 60 minutes difference in $3/16$ × 12 × 60 = 135 days.
Question : 3
I have two watches with a 12 hour cycle. One of them gains one minute a day and the other loses 1$1/2$ minute per day. If I set them both at the correct time, how long will it be before they again tell the correct time together?
a) 720 days
b) 288 days
c) 480 days
d) 1440 days
Answer »Answer: (d)
Clearly, the first watch will show the correct time when it has gained 12 hours
i.e., (12 × 60) = 720 min and the second watch will show the correct time when it has lost 720 min.
Time taken by first watch to gain 720 min = 720 days.
Time taken by second watch to gain 720 min = (720 ÷ 1 $1/2$) days = (720 × $2/3$ days) = 480 days.
So the first watch shows correct time after every 720 days and the second watch after every 480 days.
Therefore, Time after which both the clocks will together tell the correct time = L.C.M. of 720 and 480 = 1440 days.
Question : 4 [E.P.F.O. (SSA) 2004]
London time is five and a half hours behind Delhi time. What time is it in London if it is 0.2.35 in Delhi?
a) 8.05
b) 21.35
c) 21.05
d) 7.05
Answer »Answer: (c)
Clearly, time in London is 5 hrs 30 minutes behind 2.35 a.m. which is 9.05 p.m. or 21.05 hrs.
Question : 5 [R.R.B., 2005]
A bus leaves at 12.25 noon and reaches destination at 10.45 am. The duration of the journey is
a) 22 hrs 20 min
b) 24 hrs 40 min
c) 22 hrs 40 min
d) 24 hrs 20 min
Answer »Answer: (a)
Duration of the journey = (Duration form 12.25 noon to midnight) + (Duration from 12.00 midnight to 10.45 a.m.)
= 11 hrs 35 min + 10 hrs 45 min = 22 hrs 20 min.
IMPORTANT verbal reasoning EXERCISES
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Click to Start..clocks Shortcuts and Techniques with Examples
verbal reasoning CATEGORIES
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» Verbal Reasoning
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» Blood Relations
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» Clocks
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» Coding & Decoding
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» Classification
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» Puzzles Test
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» Direction & Distance sense test
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» Series Completion
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» Venn Diagrams
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» Assertion & Reason
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» Cause and Effect
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» Statement & Conclusion
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» Statement & Arguments
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» statement & Assumptions
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» Statement & Course Of Action
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» Passage & Conclusion
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» Seating Arrangements
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» Sequential Test
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» Calendar
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» Mathematical Operations
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» Word formation
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