Tips And Tricks And Shortcuts For Clocks

Best tips & tricks on Clocks problems easily

  • Here are some easy tips and tricks for you on problems based on clocks which efficiently help in the competitive exam.
  • It is very important topic for recruitment drive.

There are following types of questions asked in exams.

Relative Speed between hour and minute hand
Relative speed of minute hand is 6 – 0.5 dpm = 5.5 dpm

Clocks_tips and tricks

Type 1: Tricks and Tips and Shortcuts on Clocks.

Question 1.

What is the angle between the minute hand and the hour hand when the time is 5:30.

Options:

A.15 °

B. 10°

C. 20°

D. None of the above

Solution: 

Tip: Simple formula to calculate the angle between the minute and the hour hand = (X*30)-((Y*11)/2)

Multiplying hours with minutes, we get = 5 x 30 = 150

Applying the formula, we get (Yx11)/2 

= 30 x 11/ 2

= 165

When we subtract the two values, we get, 

= 165 – 150

= 15°

Correct Option: A

Type 2: Shortcuts, Tricks to Solve Clocks

Ques 1

Calculate the time between 7 and 8 o’clock when the hands of a clock are in the same straight line but are not together?

Options:

A. 7:05(5/11 ) o’clock

B. 7:50 (1/13) o’clock

C. 7:20 o’clock

D. Cannot be determined

Solution:

Tip: The short formula to calculate the time when the angle is given is, 

Angle = 30 (hours) – 11/2 (minutes)

Using the above formula, we get

180 = 30 (hours) – 11/2 (minutes) 

180 =  30 (7) – 11/2 (minutes)

11/2 minutes = 210-180

Minutes = 30*2/11

= 5( 1/5)

Time = 7:05(5/11) o’clock

Correct Option: A

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