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

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.

Filed Under: Clock puzzles

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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

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 ${\left(\frac{360}{12}*\frac{31}{6}\right)}^{°}$= 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

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 $\left(2+4\frac{4}{5}\right)$ min.  or $\frac{34}{5}$  min.in 170 hrs.

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

2 min.are gained in$\left(170*\frac{5}{34}*2\right)$ 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

Filed Under: Clock puzzles

64 16454
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

Explanation:

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

Angle traced by it in  11/3 hrs=  ${\left(\frac{360}{12}*\frac{11}{3}\right)}^{°}$=${110}^{°}$

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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Q:

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

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.

Subject: Clock puzzles

4453
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?

Subject: Clock puzzles

2784
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

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 = $\frac{1}{2}$× 20 =10 degrees.

Filed Under: Clock puzzles
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