Quantitative Aptitude · Reasoning

Time and Clocks

491 Questions

Time and clocks problems evaluate quantitative aptitude by testing concepts on clock gains, losses, and relative speeds of hands. Questions also cover global time zones and standard time calculations. These logical reasoning topics frequently appear in SSC and banking exams.

Clock gain or lossTime zonesAngle between handsStandard time calculationPrecise time measurement

Time and Clocks Questions

Multiple choice

How will you write 10 PM as 24 hour clock?

  1. 10:00 hrs

  2. 11:00 hrs

  3. 22:00 hrs

  4. 23:00 hrs

  5. 9:00 hrs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a right answer, as if we see time in 24 hours clock then 10 PM will be written as 22:00 hrs.

Multiple choice

Which of the hand moves fastest in the clock?

  1. Hour hand

  2. Minute hand

  3. Second hand

  4. Both minute and second hand

  5. All hands move at the same speed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Second hand is the thinnest hand, it moves faster than the other two hand. Second hand moves 1440 times in 24 hours.

This is the correct option.

Multiple choice

Ten past 9 in the evening is written as:

  1. 10.9 PM

  2. 9.10 PM

  3. 9.10 AM

  4. 8.50 PM

  5. 8.50 AM
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the right answer.

10 past nine in the evening is 9.10 PM.

10 past nine in the morning will be written as 9.10 AM.

Multiple choice

Consider the following statements regarding Indian Standard Time (IST):

1.         IST is standardised according to the 82.5° E longitude passing through Shankargarh fort in Allahabad. 2.         Bagaan time was introduced by British tea planters over 150 years ago and was set half an hour ahead of IST.

Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1: It is correct. Indian Standard Time is calculated on the basis of 82.5° E longitude, passing through Shankargarh fort, Mirzapur near Allahabad in the state of Uttar Pradesh. British India did not adopt the international standard time zones until 1905 when the meridian passing through Allahabad at 82.5° E (Mirzapur) of Greenwich Meridian longitude was picked as the central meridian for India, corresponding to a single time zone for the country at 5 hours and 30 minutes in advance of GMT. Statement 2: It is incorrect. Bagaan Time a.k.a. Chaibagaan Time introduced by British people more than 150 years ago, was set one hour ahead of IST for tea estates, collieries and oil industry of Assam. Moreover, Bureau of Energy Efficiency commissioned a study on quantifying energy savings through advancing IST, based on a paper published by them in Current Science in 2007. Their final report was submitted in September 2011 where it was proposed to advance the IST by half an hour to avoid the problems apprehended with respect to two time zones and DST (Daylight Saving Time). Hence, the correct option is 1.

Multiple choice

Ordinates of a 1-hour unit hydrograph at 1 hour intervals, starting from time t = 0, are 0, 2, 6, 4, 2, 1 and 0 m3/s.

Ordinate of a 3-hour unit hydrograph for the catchment at t = 3 hours is

  1. 2.0 m3/s

  2. 3.0 m3/s

  3. 4.0 m3/s

  4. 5.0 m3/s
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To convert a 1-hour unit hydrograph (UH) to a 3-hour UH, use the method of superposition. Sum the ordinates of the 1-hour UH shifted by 0, 1, and 2 hours, then divide by 3. At t=3: (Ordinate at t=3 + t=2 + t=1) / 3 = (4 + 6 + 2) / 3 = 12 / 3 = 4.0.

Multiple choice

Consider the following statements :

  1. China spans five time zones but runs on a single national time using the standard meridian of Beijing.
  2. Russia uses eight standard time zones. Which of the statements given above is/are correct ?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

China spans five geographical time zones but officially uses a single time zone (Beijing Time) for the entire country. Russia currently uses 11 standard time zones, not eight.

Multiple choice

The standard time of the following countries is ahead of or behind Greenwich Mean Time, depending on whether they are East or West of the longitude passing through Greenwich. Put them in decreasing order of Greenwich Time.

  1. Cuba
  2. Greece
  3. Iraq
  4. Costa Rica
  5. Japan

  1. 5, 3, 2, 1, 4

  2. 2, 4, 1, 3, 5

  3. 4, 1, 3, 2, 5

  4. 3, 5, 4, 1, 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Greenwich Mean Time is the standard time for time assessment in different countries. The countries which lie east of the Greenwich Line have their standard time ahead of Greenwich Mean Time, while the countries which lie west of Greenwich Line have their standard time behind Greenwich Mean Time. So, the correct sequence of the countries is Japan, Iraq, Greece, Cuba and Costa Rica.

Multiple choice impersonal pronouns pronoun english

Choose the correct option that answers the question:

What is the time?

  1. She is six o'clock.

  2. Mine is six o'clock.

  3. It is six o'clock.

  4. This is six o'clock.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An impersonal pronoun is commonly used to speak about impersonal things/ideas. ‘It’ is an impersonal pronoun that is used for this purpose. ‘It’ is used while speaking of the time, distance, weather or temperature. Since the given question is about the time, ‘It’ would be the apt pronoun. So the answer should be ‘It is six o’clock’. Thus option C is correct. On the other hand, the pronoun ‘she’ is a personal pronoun that is associated with a particular person. As we are speaking about time and not a person ‘she’ cannot be used. Hence option A is incorrect. Similarly, we cannot use ‘Mine’ because it is a possessive pronoun that is used to talk about things that belong to people. Since the sentence doesn’t speak about belonging, option B is incorrect. While ‘This’ is an example of demonstrative pronoun that points out the object/person that is near someone/something. It is not used to denote time. Thus option D is incorrect. 

Multiple choice

Automatic timing is ____ accurate than manual timing.

  1. just as

  2. more

  3. less

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Automatic timing systems are considered more accurate than manual timing because they eliminate human reaction time and ensure consistent delivery of energy for every insertion.

Multiple choice conversion of time time conversion time measurement of time maths

Express $5\dfrac {2}{3} hrs$ in minutes.

  1. $235\ mins$
  2. $320\ mins$
  3. $340\ mins$
  4. $523\ mins$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$5\dfrac {2}{3} hrs = \dfrac {17}{3}hrs$
$1\ hr = 60\ mins$
$\therefore \dfrac {17}{3} hrs = \dfrac {17}{3} \times 60\ mins = 340\ mins$.