#### Clock puzzles Question & Answers

5

• Related Questions

6:45

Explanation: As you move from left to right, add 1 to the value of each digit on the watch, and rotate the digits one place to the left.

Subject: Clock puzzles

9

To the 6

Explanation:

Starting with the top left clockface and working clockwise around the others, the sum of the numbers pointed to by the 2 hands starts at 3 and increases by 2 each time.

Subject: Clock puzzles

4

Hour hand points to 8

Explanation:

Starting with the top clockface, and moving clockwise around the others, the minute hand moves forward 15 minutes, while the hour hand moves back 2 hours each time.

Subject: Clock puzzles

1

At 3.40, the hour hand and the minute hand of a clock form an angle of:

 A) 120 degrees B) 125 degrees C) 130 degrees D) 135 degrees

Explanation:

Angle traced by hour hand in 12 hrs. = 360º.

Angle traced by it in  ${\color{Black}&space;\frac{11}{3}}$ hrs=  ${\color{Black}&space;\left&space;(&space;\frac{360}{12}&space;\times&space;\frac{11}{3}\right&space;)^{o}}$=${\color{Black}110&space;^{o}}$

Angle traced by minute hand in 60 min. = 360º.

Angle traced by it in 40 min. =${\color{Black}\left&space;(&space;\frac{360}{60}&space;\times&space;40\right&space;)^{o}}$=${\color{Black}240^{o}}$

${\color{Black}&space;\therefore&space;}$ Required angle (240 - 110)º = 130º.

Subject: Clock puzzles

16

A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct?

 A) 2 p.m. on Tuesday B) 2 p.m. on Wednesday C) 3 p.m. on Thursday D) 1 p.m. on Friday

Explanation:

Time from 12 p.m. on Monday to 2 p.m. on the following Monday = 7 days 2 hours = 170 hours.

${\color{Black}&space;\therefore&space;}$ The Watch gains ${\color{Black}&space;\left&space;(&space;2+4\frac{4}{5}&space;\right&space;)&space;}$ min.  or ${\color{Black}&space;\frac{34}{5}&space;}$  min.in 170 hrs.

Now,  $\inline \fn_cm \frac{34}{5}$min.are gained in 170 hrs.

${\color{Black}\therefore&space;}$  2 min.are gained in${\color{Black}\left&space;(&space;170\times&space;\frac{5}{34}\times&space;2&space;\right&space;)&space;}$ hrs=50 hrs

${\color{Black}&space;\therefore&space;}$ Watch is correct 2 days 2 hrs. after 12 p.m. on Monday i.e., it will be correct at 2 p.m. on Wednesday