[Aptitude] Logical Arrangement : Circular / Round Table

MK Pandey Fast track to objective arithmetic
  1. Introduction
  2. Circular arrangement
  3. Step 1: Draw the diagrams
  4. Step 2: Run the Checklist
  5. Step 3: Proceed with questions

Introduction

There are 4 types of ‘Logical-Arrangement’ questions

  1. Circular : Sitting In a Round Table
  2. Linear : Sitting in rectangular table or row
  3. Traits: List of people given, A lives in Hyderabad and prefers T  and owns Maruti etc.
  4. Family trees: A is the father of B who is mother Office…

These problems are quite easy to solve but can be very time-consuming if you donot proceed in a proper manner.

Circular arrangement

It is the easiest of all arrangement questions.
However one point must be kept in mind: “A is sitting adjacent to B”= Either A is on left side of B OR A is on right side of B. In short, you’ve to consider multiple possible cases during the calculation.
Let’s try a question

6 people A to F are sitting in a round table. A is not adjacent to B or C; D is not adjacent to C or E; B and C are adjacent; F is in the middle of D and C.

Step 1: Draw the diagrams

It is compulsory to draw diagram. You can’t solve the ‘circular-arrangement’ with drawing diagrams.
Ok, Lot of people are not sitting adjacent to eachother but we can’t use those “negatives” as starting-point to draw a diagram.
Better take the positive statement “B and C are adjacent” as our starting point and proceed.
There are two possible cases

  • Either C is on the right side of B Or
  • C is on the left side of B.

aptitude CSAT CMAT CAT IBPSaptitude CSAT CMAT CAT IBPS
Now use another positive statement: “F is in the middle of D and C.” Fill this in given cases
New diagrams look like this
aptitude CSAT CMAT CAT IBPSaptitude CSAT CMAT CAT IBPS

Now deal with the negative statements:”A is not adjacent to B or C”
Consider case#1: There are only two seats left: skyblue and orange colored.
But A cannot be seated in skyblue chair, because question statement says “A is not adjacent to B or C”
Therefore A can be seated only in orange chair for case #1 and
Similarly for case #2, A can be seated only in Red chair.
After A is seated, there is only one seat left and only one man (E) is left so we place him in the remaining seat.
aptitude CSAT CMAT CAT IBPSaptitude CSAT CMAT CAT IBPS
Alright all seats are now occupied, which means we’ve to run the checklist. IT serves two purposes

  • Incase you made any mistake in arrangement, you’ll find out at this stage OR
  • In One of the two cases, all checklist will not ‘pass’ thus we can eliminate one possible case and will be left with final perfect correct arrangement.

Step 2: Run the Checklist

Checklist Case 1 Case 2
A is not adjacent to B or C Pass Pass
D is not adjacent to C or E Pass Pass
B and C are adjacent Pass Pass
F is in the middle of D and C. Pass Pass

Damn it, both cases are passing the checklist. Time for some questions

Step 3: Proceed with questions

Q1. If one neighbor of A is D, who is the other one?

aptitude CSAT CMAT CAT IBPSaptitude CSAT CMAT CAT IBPS
Both cases are valid and in both cases A is sitting between D and E.
Therefore if one neighbor of A is D, then other is E. We get same neighbor “E” in both cases.

Ans. E is the other neighbor.

Q2. Who is sitting on the left hand side of A?

Both case are valid and in first case, D is sitting on the left hand side of A.
But second case, E is sitting on the left hand side of A.
So we are not getting ‘one’ definite answer. It can be either D or E. So final answer is
Ans. No conclusion. Cannot be determined. Data insufficient. D or E.

Lucent General Knowledge Objective English

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अब तक 23 कमेंट्स लिखी गयी

  1. Deepak Vashist says:

    Can't the arrangement be A,D,B,C,E,F
    IT IS ALSO PASSING THE CHECKLIST.

    • aditi says:

      how F is in middle of D and C with your answer?

  2. Deepak Vashist says:

    cANT THE ARRANGEMENT BE AS
    A,D,B,C,E,F
    its passing the checklist..but answers not same.

  3. Mrunal ♣ मृणाल ♣ મૃણાલ says:

    Your arrangement is not passing the checklist.
    Checklist Item #4 says F is in middle of D and C.
    In your arrangement (ADBCEF), F is in middle of E and A.

    • xxx says:

      blind or what ?

  4. ELIENE VIEIRA DE ARAÚJO says:

    N A VERADDE EU ESTAVA PESQUISANDO AS TABELAS DO RACIOCÍNIO PARA APRENDER DE UMA FORMA CONCISA COISA QUE NÃO TEM.

  5. Neeraj says:

    Mrunal Ji,
    The link to venn diagram is not working, kindly fix it if possible.

  6. Mridula says:

    Sir
    I have MK Pandey 2011 BSC publication.I don’t have seating arrangement as a separate chapter in it,the chapter-20 is Problem Solving! What to do for that!U have told to do it first from K Pandey Chapter-20 and then go to RS Aggarwal!

    Help!

  7. love says:

    thankyou sir

  8. Ceral says:

    Sir, Only to solve to find answer is very easy, but is very tough to solve in a limited time.. SIr please tell me some short cut method to solve in just 30 seconds.

  9. Dhrubo says:

    What about the DOUBLE LAYER puzzle..!!

  10. Neha says:

    Dear Mrunal,

    Please help on double layer puzzels.
    Like sitting in circular way with professions and names.

    I need help on these as they are very popular with upcoming RBI exam

  11. Rakesh Kumar says:

    Dear Sir,
    Pls help me to solve the below circular arrangement question which had been asked in SBI(Associates)PO Exam-2011. I tried to solve several times but failed, pls help.

    Eight colleagues, A B C D E F G and H are sitting around a circular table facing the centre but not necessarily in same order. Each one holds a different post- Manager, Company secretary, Chairman, President, Vice President, Group Leader, Financial Advisor and Managing Director.
    A sits third to the right of managing Director. only two people sit between Managing director and H. The vice President and the company Secretary are immediate neighbours. Neither A nor H is a Vice Presidentor or a Company Secretary. The Vice President is not an immediate neighnour of the Managing Director. The Manager sits second to the left of E. E is not an immediate neighbour of H. The manager is an immediate neighbour of both the Group Leader and the financial Advisor. The Financial Advisor sits third to the right of B. B is not the Vice President. C sits on the immediate right of the Chairman. A is not the Chairman. F is not an immediate neighbour of A. G is not an immediate neighbour of the Manager.

    • Sai Abhishek says:

      A-PRESIDENT,B-CHAIRMAN,C-GROUP LEADER,D-FINANCIAL ADVISOR,E-MD, F- COMPANY SECRETARY,G- VICE PRESIDENT, H- MANAGER. STARTING FROM (D’s) lefthand direction (clockwise)it is
      “D-H-C-B-A-G-F-E”. drop me a personal mail for detailed explanation notes on how i’ve arrived based on given clues of the Question

      • balachander says:

        pls send me notes for the seating arrangement question sent by rakesh kumar sir :) thank u :)

        • Sai Abhishek says:

          First of all i would like to wish you a very happy dusshera Mr. Balachander.

          please go through the link which leads to the word document where i have explained the process as of how i’ve arrived at the answer.
          It’s the best possible way i could explain the clues, their inferences regarding to the arrangement.

          “http://www.mediafire.com/view/26q2gbx8vsb8p67/Explanation_-_Seating_Arrangements.doc”

          please let me know that, did you understand the explanation ?? was my explanation has reached upto your expectation or not and was it in the convincing one or not??

          Your feedback is valuable to me …. please take time to comment after going through the word document

          • deepika says:

            Hello sir, Thanks 4 ur pdf :) :)
            but i have a doubt- second statement says “only two people sit between Managing director and H” ..Does our final ans satisfy this condition?

          • Sai Abhishek says:

            Greetings ms.deepika,
            happy diwali to you in advance, thanks for pointing out the mistake and i apologise for the same to all the forum members.
            Follow this link uploaded by me, a word document with correct arrangement::

            http://www.mediafire.com/view/kaaaqrj226uuzhw/Correct_Arrangement.doc

            correct arrangement + explanation has been provided in the above doc.

          • deepika says:

            Thank you for your response,sir.. Advance happy diwali to you too :)

  12. MAITREY SHARMA says:

    Mrunal sir have u posted any article on sitting on 2 parallely arranged tables each table facing the other

  13. vikas says:

    Dear Mr. Mrunal
    In chapter #6 Puzzle Tests of Modern Approach To Verbal & Non-Verbal Reasoning by R.S.Agarwal page no. 258 Question No. 31 , 32 , 33 , 34 are neither correctly explained nor are their answers correct…
    If possible please send me a detailed explanation….

    Also there are only 8 questions on circular arrangements in puzzles…..Can you send me few more questions of the same type and if possible with their explainable answers..

    It will be very kind of you if you can reply at the earliest as my exam is only 7 days ahead…

  14. vijay says:

    please send seating arrangement notes

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