Quantitative Aptitude · Reasoning

Time and Clocks

562 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

Indian Standard Time is ………… hours ahead of GMT/UTC:

  1. 5.5 hours

  2. 5.00 hours

  3. 5.7 hours

  4. 5.01 hours
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Indian Standard Time (IST) is calculated based on the 82.5 degrees East longitude. It is exactly 5 hours and 30 minutes (5.5 hours) ahead of Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC).

Multiple choice

The time interval between successive elements of a discrete time signal is

  1. Access time

  2. Seek time

  3. Real time

  4. Epoch
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In certain specialized signal processing contexts, an 'epoch' refers to the time interval or a specific reference point between successive elements of a discrete signal. While 'sampling period' is the more common modern term, 'epoch' is used in specific technical frameworks.

Multiple choice

When one crosses the International Date Line from west to east, then the date is said to be set back by�

  1. one hour

  2. twelve hours

  3. one day

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The International Date Line (IDL) is located at roughly 180 degrees longitude. When you cross it from West to East, you move into a time zone that is 24 hours behind, so the date is set back by one day. Conversely, crossing from East to West means you add a day.

Multiple choice

All the watches of a country are set according to the

  1. Greenwich mean time

  2. standard time of the country

  3. local time

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

To maintain consistency within a country, all watches and clocks are synchronized to a designated standard time, which is usually based on a specific meridian.

Multiple choice

Find the angle traced between the hour hand and the minute hand of the clock when the time is 3.25.

  1. 205/20

  2. 1500

  3. 95/20

  4. 500

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angle traced by hour hand in 12 hour = 360 degree

Angle traced by it in 3.25 hrs = (360/12 * 41/12) degree = 205/2 degree

Angle traced by min hand in 60 min = 360 degree

Angle traced by it in 25 min = (360 * 25 / 60)degree = 150 degree

Required angle = (150 - 205/2) = 95/2 degree