In all competitive exams questions on clock are common
In this we will dicuss on question.
At what time the hands of a clock be together?. The explanation
for this question is
Given in below table.
Sl No
|
Hours
|
Fraction part
|
Fraction part
simplified
|
Time when the hands of
a clock meet together
|
1
|
1-2
|
60/11
|
5 5/11
|
5 5/11 min past 1
|
2
|
2-3
|
120/11
|
10 10/11
|
10 10/11 min past2
|
3
|
3-4
|
180/11
|
16 4/11
|
16 4/11 min past 3
|
4
|
4-5
|
240/11
|
21 9/11
|
21 9/11
min past 4
|
5
|
5-6
|
300/11
|
27 3/11
|
27 3/11
min past 5
|
6
|
6-7
|
360/11
|
32 8/11
|
32 8/11
min past 6
|
7
|
7-8
|
420/11
|
38 2/11
|
38 2/11
min past 7
|
8
|
8-9
|
480/11
|
43 7/11
|
43 7/11 min past 8
|
9
|
9-10
|
540/11
|
49 1/11
|
49 1/11
min past 9
|
10
|
10-11
|
600/11
|
54 6/11
|
54 6/11 min past 10
|
11
|
11-12
|
660/11
|
60
|
60 min past 11 *
|
·
60 min past 11 o’ clock means 12 o’clock
|
In the above table the second column denotes the hours
where,in between the clock hands meet together. The most important column in
above table is third column which named as 'fraction part'
in first row fraction part, numerator is 60,denominator is 11. from second column onwards in the numerator fraction part,we need to add 60. Then we will get 60,120,180,240,300,360,420,480,540,600,660 in numerator of fraction part.
In the fourth column fraction part is simplified.
last column of the table shows the "time when the hands of clock together"
in the last column of "time when the hands of clock together" is "60 min past 11" means it is 12 o'clock.
Observation: By seeing above table in 12 hours the hands of a clock will meet together 11 times. In 24 hours,the hands of a clock will co-inside in 22 times. This is important point in competitive exams.
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