RRB NTPC Clocks & Calendars Questions PDF
Download RRB NTPC Clocks & Calendars Questions and Answers PDF. Top 15 RRB NTPC General Reasoning questions based on asked questions in previous exam papers very important for the Railway NTPC exam.
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Question 1: Find the mirror image of the clock when the time is 01:40
a) 11:20
b) 10:22
c) 10:20
d) 11:22
Question 2: Find the mirror image of the clock when the time is 02:40
a) 09:20
b) 10:22
c) 09:25
d) 09:22
Question 3: At what time between 2 O’Clock and 3 O’Clock, will the minute hand and hour hand of the clock be exactly opposite to each other?
a) $02:46$
b) $02:47\dfrac{6}{11}$
c) $02:43\dfrac{7}{11}$
d) $02:47$
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Question 4: At what time between 12 O’Clock and 1 O’Clock, will the minute hand and hour hand of the clock make right angles?
a) $12:46$
b) $12:15\dfrac{6}{11}$
c) $12:17\dfrac{3}{11}$
d) None of these
Question 5: At what time between 2 O’Clock and 3 O’Clock, will the minute hand and hour hand of the clock make right angles?
a) $02:32$
b) $02:29\dfrac{6}{11}$
c) $02:27\dfrac{3}{11}$
d) $02:36$
Question 6: At what time between 4 O’Clock and 5 O’Clock, will the minute hand and hour hand of the clock make right angles?
a) $04:36$
b) $04:38\dfrac{2}{11}$
c) $04:42\dfrac{4}{11}$
d) $04:39$
Question 7: A clock shows 7 O’clock in the morning. By how much angle will the hours hand rotate when the clock shows 9 O’clock in the morning.
a) $40^\circ$
b) $60^\circ$
c) $45^\circ$
d) $90^\circ$
Question 8: A clock shows 6:00 in the morning. By how much angle will the hours hand rotate when the clock shows 12:00 in the noon?
a) $120^\circ$
b) $160^\circ$
c) $180^\circ$
d) $150^\circ$
Question 9: Find the angle between the hands of the clock when the time is 10:30
a) $160^\circ$
b) $120^\circ$
c) $180^\circ$
d) $135^\circ$
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Question 10: Check which of the following years are leap years.
a) 1800
b) 1345
c) 1678
d) none of these
Question 11: March 10, 2018 is Saturday. What day of the week lies on March 10, 2019 ?
a) Thursday
b) Friday
c) Saturday
d) Sunday
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Question 12: Today is Saturday, After 43 days it will be ?
a) Wednesday
b) Friday
c) Sunday
d) Tuesday
Question 13: Sridevi was born on 13-8-1963 and died on 24-2-2018. Find her exact age ?
a) 54 years 6 months 12 days
b) 54 years 5 months 22 days
c) 54 years 5 months 12 days
d) 54 years 6 months 22 days
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Question 14: Find the average number of days per month in the year 1994 ?
a) 30.4266
b) 30.4166
c) 30.4066
d) 30.3966
Question 15: If 1st january of 1996 was Monday, then How many tuesdays did 1996 have ?
a) 53
b) 52
c) 51
d) cannot be determined
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Answers & Solutions:
1) Answer (C)
We need to subtract from 12:00 or 11:60 to get mirror image time
Mirror image of 01:40 = 11:60 – 01:40 = 10:20
2) Answer (A)
We need to subtract from 12:00 or 11:60 to get mirror image time
Mirror image of 02:40 = 11:60 – 02:40 = 09:20
3) Answer (C)
Angle between two hands $= \dfrac{11}{2}M – 30H$ where H is hours and M is Minutes
Here, H = 2 and Angle = $180^\circ$
$180^\circ = \dfrac{11}{2}M – 30\times2$
⇒ $\dfrac{11}{2}M = 240$
⇒ $M = \dfrac{480}{11} = 43\dfrac{7}{11}$
Hence, the required time = $02:43\dfrac{7}{11}$
4) Answer (D)
Angle between two hands $= \dfrac{11}{2}M – 30H$ where H is hours and M is Minutes
Here, H = 12 and Angle = $90^\circ$
$90^\circ = \dfrac{11}{2}M – 30\times12$
⇒ $\dfrac{11}{2}M = 450$
⇒ $M = \dfrac{900}{11} = 81\dfrac{9}{11}$
Hence, the required time = $12:81\dfrac{9}{11}$ which is $01:21\dfrac{9}{11}$
Hence, Between 12 O’Clock and 1 O’Clock, there is no right angle.
5) Answer (C)
Angle between two hands $= \dfrac{11}{2}M – 30H$ where H is hours and M is Minutes
Here, H = 2 and Angle = $90^\circ$
$90^\circ = \dfrac{11}{2}M – 30\times2$
⇒ $\dfrac{11}{2}M = 150$
⇒ $M = \dfrac{300}{11} = 27\dfrac{3}{11}$
Hence, the required time = $02:27\dfrac{3}{11}$
6) Answer (B)
Angle between two hands $= \dfrac{11}{2}M – 30H$ where H is hours and M is Minutes
Here, H = 4 and Angle = $90^\circ$
$90^\circ = \dfrac{11}{2}M – 30\times4$
⇒ $\dfrac{11}{2}M = 210$
⇒ $M = \dfrac{420}{11} = 38\dfrac{2}{11}$
Hence, the required time = $04:38\dfrac{2}{11}$
7) Answer (B)
In 12 hours, the hand turns $360^\circ$.
Here, the difference between time = 2 hours
Then, Required angle $= \dfrac{360}{12}\times2 = 60^\circ$
8) Answer (C)
In 12 hours, the hand turns $360^\circ$.
Here, the difference between time = 6 hours
Then, Required angle $= \dfrac{360}{12}\times6 = 180^\circ$
9) Answer (D)
Required angle $= 30H – \dfrac{11}{2}M$ where H is hours and M is Minutes
Here, H = 10 and M = 30
Hence, Required angle $= 30\times10 – \dfrac{11}{2}\times30$
$= 300 – 165 = 135^\circ$
10) Answer (D)
1800 is century year so it must me divisible by 400 to be a leap year.
1345, 1678 are not divisible by 4,
So the answer is option D.
11) Answer (D)
The year 2018 is non-leap year, so it has 365 days, 365 = 52 weeks + 1 odd day
Hence one day beyond Saturday is Sunday.
So the answer is option D.
12) Answer (C)
Today is Saturday.
Each day of the week is repeated after every 7 days.
Hence, after 42 days it will be Saturday.
So after 43 days, it will be Sunday.
So the answer is option C.
13) Answer (A)
13-8-1963 to 12-8-2017 = 54 years
13-8-2017 to 12-2-2018 = 6 months
13-2-2018 to 24-2-2018 = 12 days
So the answer is option A.
14) Answer (B)
1994 has 365 days
average days per month = $\frac{365}{12} = 30.4166$
So the answer is option B.
15) Answer (A)
1996 has 366 days = 52 weeks + 2days
If 1st jan 1996 was monday, it would have 53 mondays and 53 tuesdays
So the answer is option A.\
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