Posted On:March 2, 2019, Posted By: Latest Interview Questions,
Views: 494, Rating :

Dear Readers, Welcome to __ Clock - Aptitude Objective Questions__ have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of

**1.** The face or dial of watch is a circle whose circumference is divided into 60 equal parts, called minute spaces.

**2.** A clock has two hands, the smaller one is called the hour hand or short hand while the larger one is called minute hand or long hand.

(i) In 60 minutes, the minute hand gains 55 minutes on the hour on the hour hand.

(ii) In every hour, both the hands coincide once.

(iii) The hands are in the same straight line when they are coincident or opposite to each other.

(iv) When the two hands are at right angles, they are 15 minute spaces apart.

(v) When the hands are in opposite directions, they are 30 minute spaces apart.

(vi) Angle traced by hour hand in 12 hrs = 360°.

(vii) Angle traced by minute hand in 60 min. = 360°.

(viii) If a watch or a clock indicates 8.15, when the correct time is 8, it is said to be 15 minutes too fast.

(ix) On the other hand, if it indicates 7.45, when the correct time is 8, it is said to be 15 minutes too slow.

Explanation:

At 8 o’clock, the hour hand is at 8 and the minute hand is at 12, i.e. the two hands are 20 min. spaces apart.

To be i the same straight line but not together they will be 30 minute spaces apart. So, the minute hand will have to gain (30 - 20) = 10 minute spaces over the hour hand.

55 minute spaces are gained in 60 min.

10 minute spaces will be gained in [60/55 * 10] min. = 10 10/11 min.

=> The hands will be in the same straight line but not together at 10 10/11 min. past 8.

Explanation:

Angle traced by the hour hand in 12 hours = 360°.

Angle traced by it in 3 hrs 25 min. i.e. 41/12 hrs =

[360 / 12 * 41/12] = 102½°

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

Angle traced by it in 25 min. = [360 / 60 * 25]° = 150°.

=> Required angle = [150° - 102½°] = 47½.

Explanation:

Time from 8 a.m. on Sunday to 8 p.m. on following Sunday = 7 days 12 hours = 180 hours.

=> The watch gains [5+5 4/5] min. or 54/5 min. in 180 hrs.

Now 54/5 min. are gained in 180 hrs.

=> 5 min. are gained in [180 * 5/54 * 5] hrs. = 83 hrs 20 min. = 3 days 11 hrs 20 min.

=> It will be correct at 20 min. past 7 p.m. on Wednesday.

Explanation:

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

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

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'clock only).

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

A. 8 p.m

B. 9 p.m

C. 10 p.m

D. 11 p.m

Explanation:

Time from 5 a.m. on a day to 10 p.m. on 4th day = 89 hours.

Now 23 hrs 44 min. of this clock = 24 hours of correct clock.

=> 356/15 hrs of this clock = 24 hours of correct clock.

= 90 hrs of correct clock.

So, the correct time is 11 p.m.

A. 2 p.m. on Monday

B. 2 p.m. on Tuesday

C. 2 p.m. on Wednesday

D. 3 p.m. on Thursday

**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 + 4 4/5] min. or 34/5 min. in 170 hrs.

Now, 34/5 min. are gained in 170 hrs.

=> 2 min. are gained in [170 * 5/34 * 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.

A. 40 min. past 5

B. 42 min. past 5

C. 43 4/11 min past 5

D. 43 7/11 min. past 5

**Explanation:**

At 5 o’clock, the hands are 24 min. spaces apart.

To be at right angles and that too between 5.30 and 6, the minute hand has to gain (25 + 15) = 40 min. spaces.

55 min. spaces are gained in 60 min.

40 min. spaces are gained in [60/55 * 40] min. = 43 7/11 min.

=> Required time = 43 7/11 min. past 5.

A. 54 6/11 min. past 4

B. 50 min. past 4

C. 45 min past 4

D. 40 min past 4

**Explanation:**

At 4 o’clock, the hands of the watch are 20 min. spaces apart.

To be in opposite directions, they must be 30 min. spaces apart.

=> Minute hand will have to gain 50 min. spaces.

55 min. spaces are gained in 60 min.

50 min. spaces are gained in [60/55 * 50] min. or 54 6/11 min.

=> Required time = 54 6/11 min. past 4.

A. 49 1/11 min. past 9

B. 40 min. past 9

C. 45 min. past 9

D. 50 min. past 9

**Explanation:**

To be together between 9 and 10 o’clock, the minute hand has to gain 45 min. spaces. 55 min. spaces gined in 60 min.

45 min. spaces are gained in [60 / 55 * 45] min. or 49 1/11 min.

=> The hands are together at 49 1/11 min. past 9.

A. 22

B. 23

C. 24

D. 25

**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’clock only). So, in a day, the hands point in the opposite directions 22 times.

A. 11

B. 22

C. 33

D. 44

**Explanation:**

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

=> In 24 hours, they are at right angles 44 times.

A. 12

B. 24

C. 44

D. 56

**Explanation:**

In 12 hours, the hands coincide or are in opposite direction 22 times.

=> In 24 hours, the hands coincide or are in opposite direction 44 times a day.

A. 11

B. 12

C. 22

D. 24

**Explanation:**

The hands of a clock coincide 11 times in every 12 hours (Since between 11 and 1, they coincide only once, i.e. at 12 o’clock).

=> The hands coincide 22 times in a day.

A. 60°

B. 90°

C. 180°

D. 320°

**Explanation:**

Angle traced by the hour hand in 6 hours = [360/12 * 6]°

= 180°