Clock – Railway Reasoning

Total Questions: 37

1. How many times in 48 hours will the hour and minute hands of an accurate clock point in opposite directions? [Group - D 23/08/2022 (Evening) ]

Correct Answer: (a) 88
Solution:

In 12 hours, the minute and hour hands of a clock are in opposite direction 22 times Therefore, in 48 hours, they will be in opposite direction = 22 4 = 88 times

2. At what time between 2 : 30 p.m. and 3 : 30 p.m. will the hands of a clock be together? [Group - D 26/09/2022 (Evening)]

Correct Answer: (b)
Solution:

Angle between the handsm = minute hand , H = hour hand
The hands of clock can’t be together between 2 : 30 - 3 : 00
So, we take H = 3 Angle = 0

3. If the time in the mirror image of a 12-hour clock is 3 : 25, what is the actual time? [Group - D 30/09/2022 ( Morning)]

Correct Answer: (b) 8 : 35
Solution:

When the time in the mirror image of a 12 hour clock is 3 : 25 then actual time is 8 : 35.

4. A working clock is placed on a table in such a manner That at 9:00 p. m., its hour hand is pointing towards north. If the same clock remains in the same position, in which direction will the minute hand point at 2.00 a.m.? [NTPC CBT II Level 4 (10/05/2022) Shift 1]

Correct Answer: (a) East
Solution: At 2am hour hand is at 2 and minute hand is at 12 so minute hand points towards East

5. According to the time by Rick’s watch its quarter past eight. If the minute hand points towards the east, towards which direction would the hour hand point? [NTPC CBT - I 19/01/2021 (Morning)]

Correct Answer: (b) South - West
Solution:

As shown in diagram hour hand is in South West Direction

6. How will you write 7.17 hours in hours, minutes and seconds? [NTPC CBT - I 14/03/2021 (Morning)]

Correct Answer: (d) 7 hours, 10 minutes, 12 seconds
Solution:

7.17 hours = 7 hours + 0.17 × 60 𝑚𝑖𝑛𝑢𝑡𝑒𝑠
= 7 hours + 10 minutes + 0.2 × 60 𝑠𝑒𝑐𝑜𝑛𝑑𝑠
7 hours + 10 minutes + 12 seconds

7. A clock is set to the right time at 4:00 AM on Thursday. If it gains 20 seconds in every 3 hours,then what is the time shown on the clock at 8:30 PM on Friday night? [RRB JE 22/05/2019 (Afternoon)]

Correct Answer: (d) 8 hours 34 minutes 30 seconds PM
Solution:

Total time, From Thursday 4 : 00 am to Friday 8 : 30 pm = 40 hour 30 minutes
According to the question,
Clock gains in 3 hours = 20 secondsSince clock gains 270 seconds So time is 8 : 30 PM + 270 seconds = 8 : 30 PM + 4 minute and 30 second
Hence it will become 8 hours 34 minutes and 30 seconds PM.

8. A watch reads 4:30. If the minute hand points east, in what direction will the hour hand point? [RRB JE 02/06/2019 (Afternoon)]

Correct Answer: (d) North east
Solution:

From the diagram it is clearly seen that the hour hand points in the North east direction.

9. In 16 minutes, the minute hand gains _______ over the hour hand. [RRB JE 28/06/2019 (Evening)]

Correct Answer: (a) 88°
Solution:

In one hour the minute hand gains 330º over hour hand
Therefore in 16 minute the minute hand gained over hour hand by

10. What is the angle between the hour and minute hands of a clock at 4 : 45 ? [RRB ALP Tier - I 21/01/2019 (Afternoon)]

Correct Answer: (c) 127.5°
Solution:

The angle formed between the hour hand and the minute hand