Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 13)
13.
How many times in a day, are the hands of a clock in straight line but opposite in direction?
Answer: Option
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.
Discussion:
49 comments Page 3 of 5.
Electronics said:
1 decade ago
The concept is we start from 12 they are one time opposite before 1 pm.
Similarly they will be opposite one more time before 2 pm. This is the condition till 5 pm but at 6 they are opposite at exactly 6 ( minute hand at 12 hour hand at 6 ) after this they will be opposite 7 times after 7 similarly opposite 11 times after 11 and 12 times after twelve gotcha after twelve so upto twelve only 11 times.
So in 24 hours 11+11 = 22 times.
Similarly they will be opposite one more time before 2 pm. This is the condition till 5 pm but at 6 they are opposite at exactly 6 ( minute hand at 12 hour hand at 6 ) after this they will be opposite 7 times after 7 similarly opposite 11 times after 11 and 12 times after twelve gotcha after twelve so upto twelve only 11 times.
So in 24 hours 11+11 = 22 times.
Mohan said:
1 decade ago
The time between 5 and 6 o'clock when two hands of a clock are in same line making angle of 180 degree?
Akshaya said:
1 decade ago
I have a doubt. You all say the hour and minute hands are in straight line only once between 5 and 7. What about 5:55?
Alka said:
1 decade ago
Which angle a clock will make if both the needles are at 6.
Kishori said:
1 decade ago
I want check. When in watch make time 2:45 pm that time which angle will be there.
Maddy said:
1 decade ago
Take a watch rotate check it.
Rajneesh said:
1 decade ago
Following are the time when they are straight.
12:30.
1:35.
2:40.
3:45.
4:50.
5:55.
6:00.
7:05.
8:10.
9:15.
10:20.
11:25.
And they are all 12.
Is I am missing something? How it is 11?
12:30.
1:35.
2:40.
3:45.
4:50.
5:55.
6:00.
7:05.
8:10.
9:15.
10:20.
11:25.
And they are all 12.
Is I am missing something? How it is 11?
Garhwal said:
1 decade ago
@Rajneesh.
The hands are not in a straight line at 5.55. Take a hand watch and see for yourself. This is the point being made. From 4:50, the next occurrence happens only at 6:00.
So in total, for every 12 hours, we have 11 such instances. For 24 hours, the number of instances is 11*2=24.
The hands are not in a straight line at 5.55. Take a hand watch and see for yourself. This is the point being made. From 4:50, the next occurrence happens only at 6:00.
So in total, for every 12 hours, we have 11 such instances. For 24 hours, the number of instances is 11*2=24.
(2)
Sanchit bhardwaj said:
1 decade ago
Great this question was one of the mind buzzing.
And to tell you if you are taking opposite hands of watch as 12:30, 1:35 so on, then I am afraid your are wrong.
Because the hour hand won't be exactly on 12 if its 12:30, it will be at mid way of 12 and 1; and if its midway how can you put minute hand of watch on 12:30.
It should be somewhere around 12:32.5. Rest you can check manually.
And to tell you if you are taking opposite hands of watch as 12:30, 1:35 so on, then I am afraid your are wrong.
Because the hour hand won't be exactly on 12 if its 12:30, it will be at mid way of 12 and 1; and if its midway how can you put minute hand of watch on 12:30.
It should be somewhere around 12:32.5. Rest you can check manually.
Aman said:
1 decade ago
I can't understand how there is the loss of two hours? Please tell me.
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