0
9238

# 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.

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) $02:47$

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) $135^\circ$

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

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

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

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

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

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 = $02:43\dfrac{7}{11}$

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.

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 = $02:27\dfrac{3}{11}$

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 = $04:38\dfrac{2}{11}$

In 12 hours, the hand turns $360^\circ$.
Here, the difference between time = 2 hours
Then, Required angle $= \dfrac{360}{12}\times2 = 60^\circ$

In 12 hours, the hand turns $360^\circ$.
Here, the difference between time = 6 hours
Then, Required angle $= \dfrac{360}{12}\times6 = 180^\circ$

Required angle $= 30H – \dfrac{11}{2}M$ where H is hours and M is Minutes
Here, H = 10 and M = 30
Hence, Required angle $= 30\times10 – \dfrac{11}{2}\times30$
$= 300 – 165 = 135^\circ$

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.

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.

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.

13-8-1963 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.

1994 has 365 days

average days per month = $\frac{365}{12} = 30.4166$

So the answer is option B.