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A Learning Portal from Recruitment India

An accurate clock shows 8 o’clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 2 o’clock in the afternoon?

A.

60

B.

90

C.

180

D.

360

Answer with explanation

Answer: Option CExplanation

Angle traced by the hour hand in 6 hours=(360/12)*6

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In 16 minutes, the minute hand gains over the hour hand by

A.

88°

B.

80°

C.

60°

D.

90°

Answer with explanation

Answer: Option AExplanation

In 1 hour, the minute hand gains 330° over the hour hand. i.e. in 60 minutes, the minute hand gains 330° over the hour hand.

∴ In 16 minutes, the minute hand gains over the hour hand by

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

A.

12

B.

22

C.

24

D.

48

Answer with explanation

Answer: Option BExplanation

The hands of a clock point in opposite directions (in the same straight line, making an angle 180° between them) 11 times in every 12 hours because between 5 and 7 they point in opposite directions at 6 ‘o clock only.

Hence the hands point in the opposite directions 22 times in a day.

This is already given as a formula and it’s is better to learn the answer by heart as 22 which can save time in competitive exams. (However, you should know the theory behind).

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How much does a watch lose per day, if its hands coincide every 64 minutes?

A.

96min

B.

90min

C.

36 5/11min

D.

32 8/11min

Answer with explanation

Answer: Option DExplanation

55 min. spaces are covered in 60 min.

60 min spaces are covered in (60/55 × 60)min = 65 5/11 min

Loss in 64 min = ( 65 5/11- 64 ) = 16/11 min

Loss in 24 hrs = ( 16/11 × 1/64 × 24 × 60 ) min

= 32 8/11 min

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A watch gain 8 seconds in 4 minutes and was set right at 4 AM. What time will it show at 11 PM on the same day?

A.

11:38

B.

12:08

C.

11:08

D.

12:38

Answer with explanation

Answer: Option AExplanation

8 Seconds in 4 Minutes mean 120 Seconds (or 2 Minutes) in one hour.

From 4AM to 11PM (on the same day) = 19 hours

So, total seconds gain in 19 hours = 19 X 120 (Seconds gain per hour) = 2280 Seconds.

Now, 2280 Seconds = 38 Minutes (i.e. 2280/19 = 38)

Thus incorrect clock will show 11:38PM at 11PM.

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A clock which loses uniformly was observed to be 5 minutes fast at 4:00 p.m on a Friday. On the subsequent Sunday at 8:00 a.m, the watch was 3 minutes slow. When did the watch show the correct time?

A.

8:00 p.m. on Saturday

B.

5:00 p.m. on Saturday

C.

4:00 p.m. on Saturday

D.

7:00 p.m. on Saturday

Answer with explanation

Answer: Option BExplanation

Number of minutes lost = 8

Total time from 4:00 p.m. on Friday to 8:00 a.m. on

Sunday = 40 hours.

There for, It lost 8 minutes in 40 hours

Time taken to lose 5 minutes = ( 40 x 5) / 8= 25 hours.

Whenever it lost the first 5 minutes, the clock is going to show the correct time.

After 25 hours (i.e.,) at **5:00 p.m. on Saturday** the cock shows the correct time

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