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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934 130131
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.,31/6hrs== 155º
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540 90948
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 min. or min.in 170 hrs.
Now, min.are gained in 170 hrs.
2 min.are gained inhrs=50 hrs
Watch is correct 2 days 2 hrs. after 12 p.m. on Mondayi.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 11/3hrs= =
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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152 44968
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
123 35575
Q:
At what time between 2 and 3 O'clock, the hands of a clock coincide ?
A) 1 10/11 minutes past 2 | B) 1 10/11 minutes past 3 |
C) 1 11/10 minutes past 3 | D) 11 10/11 minutes past 2 |
Answer & Explanation Answer: A) 1 10/11 minutes past 2
Explanation:
Since, in one hour, two hands of a clock coincide only once, so, there will be value.
Required timeminutes past H.
Here H - initial position of hour hand = 2 (since 2 O'clock)
A° = Required angle = 0° (Since it coincides)
minutes past 2
=> minutes past 2
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47 12775
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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65 12307
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 = × 20 =10 degrees.
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50 12086