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A school is organizing guest lectures on three different subjects:

  • Robotics
  • English
  • General Aptitude

The event is taking place over three days.The eight lectures are named P,Q,R,S,T,U,V and W,

  • Robotics and English are to be covered in three lectures each while the remaining lectures are for general aptitude
  • Lecture P, R and S to be on different days
  • Lecture V and W should come on the same day
  • Lecture Q cannot be put up with P, W and S
  • Q and U lectures happen on the same day
  • Lecture P is one Robotics and is held one day before R
  • Lecture R cannot be on the last Day
  • There are at least 3 lectures on day 1

I don't know how to solve it and please anyone guide me the steps, How to proceed these type of sum, which have to take as the first step

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There seems to be quite a bit of missing information. Also I am not sure what your question is as none were asked. But here is all the info that CAN be deduced with what you wrote.

First, P R S are on different days.
[P][R][S]
Then Q cannot be with P or S.
[P][R,Q][S]
Then U must be with Q.
D1: [P][R,Q,U][S]
P is before R and R is not last. So the current order of days is correct.
D1: [P], D2: [R,Q,U], D3: [S]
There must be 3 lectures on day 1, Lecture V and W are on the same day and only 3 lectures left to place so V and W must be in day 1.
D1: [P,V,W], D2: [R,Q,U], D3: [S]
I assume that lectures on the same subject must be on different days(?) SO there must be at least 2 lectures everyday.
D1: [P,V,W], D2: [R,Q,U], D3: [S,T]
P is a robotic lecture, and there is no general aptitude lecture on day 3(?)

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  • $\begingroup$ how you are putting V ,W is on Day1, why it cannot be on day 3 $\endgroup$
    – Learning user
    Apr 3 '17 at 2:50
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    $\begingroup$ @Learninguser I thought it was obvious when I said 3 lectures must be on day 1, but added more info to clarify. $\endgroup$
    – stack reader
    Apr 3 '17 at 2:53
  • $\begingroup$ i have answer for this question, do you want to see@Stack reader $\endgroup$
    – Learning user
    Apr 3 '17 at 3:03
  • $\begingroup$ Your answer is correct, but finally they added lecture T can happen on anyday,But your explanation is very good,well done @Stack reader $\endgroup$
    – Learning user
    Apr 3 '17 at 3:06

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