# Aptitude - Clock - Discussion

Discussion Forum : Clock - General Questions (Q.No. 6)
6.
At what time between 7 and 8 o'clock will the hands of a clock be in the same straight line but, not together?
5 min. past 7
 5 2 min. past 7 11
 5 3 min. past 7 11
 5 5 min. past 7 11
Explanation:

When the hands of the clock are in the same straight line but not together, they are 30 minute spaces apart.

At 7 o'clock, they are 25 min. spaces apart.

Minute hand will have to gain only 5 min. spaces.

55 min. spaces are gained in 60 min.

 5 min. spaces are gained in 60 x 5 min = 5 5 min. 55 11

 Required time = 5 5 min. past 7. 11

Discussion:
68 comments Page 1 of 7.

How is that at 7 o'clock they are 25 min space apart ?

Nitesh Nandwana said:   1 decade ago
@Nithya.

This is very simple just see clock at the time of 7 o'clock.

The difference between hour hand and minute is 25 min.

I think they are counting clock wise direction from hour hand to minute hand. If they count from minute hand to hour hand it will be 35 mins

Simple method:

In one hour,once minute hand and hour hand comes in straight line
so our answer is something 7 past,not 8 past
use formula,
titha(0)=30h-11/2m
titha is 180,hour hand is on 7
put values
we get titha=60/11
convert into quotitent*remainder/divisor format
we get
5*5/11

So answer is 5*5/11 past 7.

In 1 hour the min hand will gain 60 min and the hour hand will gain 5 min (i.e if the time is 5 the hour hand will take 5 min spaces to reach 6) so 60-5= 55

Did you understand this?

Please someone clear that what angle in 8o'clock9 between.

How do you know that at 7 the difference is 25min?

@ Nitesh: Assuming I don't have a watch to look at and count the minutes.

Vivek jain said:   1 decade ago
How 55 min. spaces are gained in 60 min. ?