Clocks- Aptitude Questions and Answers

View in English View in Hindi

An accurate clock shows 8 O’ clock in the morning. Through how many degrees will the hours hand rotate when the clock shows 2 O’ clock in the afternoon?

A)
144o

B)
150o

C)
168o

D)
180o


Correct Answer :

180o


Explanation :

As given the hour hand going from 8 clock in the morning to 2 clock in the afternoon is equal to 6 hours of passed time.

The clock is a circle.that mean it contains 360 degrees. These 360 degrees are broken down into the 12 hours of the day.
This means there are (360 / 12) = 30 degrees in an hour.
Since 6 hours pass in the question, hence multiply (30 x 6) = 180 degrees

How many times are the hands of a clock at right angles in a day?

A)
22

B)
44

C)
24

D)
48


Correct Answer :

44


Explanation :

In 12 hours, they are at right angles 22 times.
In 24 hours, they are at right angles 44 times.

What will be the angle between the hands of a clock at 3:30 O’clock?

A)
90o

B)
75o

C)
135o

D)
60o


Correct Answer :

75o


Explanation :

The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute.

The angle traced of the hour hand = 0.5 * (60*H + M)°
Angle traced by the hour hand in 3 hour = 0.5 * (60*3 + 30)= 105°

The angle of the minute hand = 6°*M
Angle traced by the minute hand in 30 mins = 6°* 30 = 180°

The angle between the hands= |Angle of hour hand - Angle of minute hand|
Required angle, |105 - 180|° = 75°.

A clock is started at 6 O' clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 11 O' clock in the morning ?

A)
140°

B)
180°

C)
150°

D)
160°


Correct Answer :

150°


Explanation :

From 6 to 11, there are 5 hours.
Angle traced by the hour hand in 6 hours = 5*(360/12) = 150°

Or

The angle traced of the hour hand = 0.5 * (60*H + M)°
Angle traced by the hour hand in 5 hour = 0.5 * (60*5 + 0)= 150°

Latest Updates

Physics

Atmospheric pressure at sea level equals ?

General Knowledge of India

Which of the following dance forms was introduced by the great Vaishnava saint and reformer Mahapurusha Sankaradeva ?

Which of the following is the only classical dance of india having links with Muslim culture and represents a unique synthesis of Hindu and Muslim genius in art ?

Time and Distance

Starting from the same point at the same time, Ruhan and Yuvan had to reach the same destination. While Ruhan drove at 45 km/hr, Yuvan was slower by 5 km/hr. If Yuvan arrived at the destination an hour after Ruhan did, the distance covered by each, in Kilometres, was ?

Simple Interest

A sum of money was invested at a certain rate of simple interest for 4 years. Had the sum been invested at a rate 3% higher than the actual rate, the interest earned would have been 720 Rs more. Find the sum initially invested?

Ratio and Proportion

A bag contains red, blue and black balls. The ratio of red to blue balls is 3 : 5. The ratio of black to red balls is 3 : 4. What is the ratio of blue to black balls?

Profit and Loss

Selling a pack of incense sticks for 136 Rs resulted in a loss of 15%. To make a profit of 10%, the selling price should be ?

Percentage

23% of a bucket full of diluted milk was water. If the quantity of pure milk in the bucket was 15.4 liter, then the capacity of the bucket was ?

Average

The average of the marks obtained by three girls in a test was twice the average of the marks obtained by eight boys in that test. If the total marks obtained by all these examinees was 168, find the average marks each of the girls obtained ?

Pipes and Cistern

44 pipes can fill a large water tank in 27 hours. How many hours it take for 66 pipes to fill four such tanks ?

HCF and LCM

A natural number, when divided by 3, 4, 5, 6, and 7 respectively, leaves corresponding remainder of 2, 3, 4, 5 and 6. What is the smallest of all such numbers fulfilling the above condition ?

Coding-Decoding

If in a certain code language, PRINT is written as 34825 and TRUE is written as 5479. Then, how will TENURE be written in that language?

Order Sequence

Arrange the given words from smallest to biggest-
1.Jug
2.Mug
3.Bucket
4.Drum
5.Cup

Statement and Conclusion

Statements
All socks are shoes
Some shoes are black

Conclusions
I. Some shoes are socks.
II. No scoks is black

Numbers

The difference between the place value of 4 and 2 in the number 833749502 is ?

Analogy

GIKM : HJLN :: PRTV : .........?

Order Sequence

In a row of girls, Nanda is eighth from the left and Chanda is nineteenth from right. When Nanda and Chanda interchange their positions, Chanda becomes twnty-third form right. How many girls are there in the row?

Analogy

Summer: Day :: Winter : ........?