Clock puzzles Questions

Q:

How many times in a day, are the hands of a clock in straight line but opposite in direction?

A) 20 B) 22
C) 24 D) 48
 
Answer & Explanation Answer: B) 22

Explanation:

The hands of a clock point in opposite directions (in the same straight line) 11 times in every 12 hours. (Because between 5 and 7 they point in opposite directions at 6 o'clcok only).

So, in a day, the hands point in the opposite directions 22 times.

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Q:

A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:

A) 145 B) 150
C) 155 D) 160
 
Answer & Explanation Answer: C) 155

Explanation:

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

 

Angle traced by hour hand in 5 hrs 10 min.  i.e., 31/6 hrs 36012*316°= 155º

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Q:

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
 
Answer & Explanation Answer: B) 2 p.m. on Wednesday

Explanation:

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

 The Watch gains 2+445 min.  or 345  min.in 170 hrs. 

Now,  345min.are gained in 170 hrs. 

  2 min.are gained in170*534*2 hrs=50 hrs 

 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

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Q:

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
 
Answer & Explanation Answer: C) 130 degrees

Explanation:

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

 

Angle traced by it in  11/3 hrs=  36012*113°=110°

 

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

 

Angle traced by it in 40 min. =(360/60*40)°=240°

 

  Required angle (240 - 110)º = 130º.

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77 23022
Q:

What is two days after the day after the day before yesterday?

Answer

Tomorrow


The day before yesterday was two days ago; the day after the day before yesterday was yesterday; two days after that (yesterday) is tomorrow.

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Subject: Clock puzzles

43 11404
Q:

Calculate the angle between the two hands of clock when the clock shows 4 : 20 p.m. ?

A) 5 degrees B) 10 degrees
C) 15 degrees D) 25 degrees
 
Answer & Explanation Answer: B) 10 degrees

Explanation:

Since at 4 : 20 the minute hand will be at 4 and the angle between them will be same as the distance covered in degree by the hour hand in 20 minutes.

 

Required angle = distance of hour hand = speed × time = 12× 20 =10 degrees.

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22 5576
Q:

Find at what time between 9 and 10 o’clock will the hands of a clock be in 180° ?

A) 180/14 min past 10 B) 180/11 min past 9
C) 148/7 min past 10 D) 154/11 min past 9
 
Answer & Explanation Answer: B) 180/11 min past 9

Explanation:

At 9 o’clock, the hour hand is at 9 and the minutes hand is at 12, i.e., the two hands are 15 min. spaces apart.
So, the minute hand should gain = (30 - 15) minutes = 15 minutes
55 minutes will be gained in 60 min.
15 minutes spaces will be gained in ((60/55) x 15) min. = 180/11 min.
The hands will be in the same straight line but not together i.e.,in 180 degrees at 180/11 min. past 9.

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21 4439
Q:

How many minutes is it until six o’clock if fifty minutes ago it was four times as many minutes past three o’clock?

Answer Twenty-six minutes.
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