Cisco CCNA /Reasoning Ability

Seating arrangement

Non-Verbal & Puzzles · free study notes

📚 Seating Arrangement Basics

A quick guide for beginners – no jargon, just simple steps and real‑world analogies.


1. What is a Seating Arrangement Puzzle?

Imagine you’re planning a family photo.
You have a group of people and you must decide who sits where based on a list of rules (e.g., “Mom must sit next to Dad”, “Grandpa can’t be next to Grandpa’s cousin”).

In a seating arrangement puzzle you do the same thing: place people (or objects) in a row or circle so that every rule is satisfied.


2. Common Types of Rules

Rule Everyday Analogy How it Looks in a Puzzle
Next to Two friends hold hands “A sits next to B”
Opposite Two people across a table “C sits opposite D”
Not next to Avoid a noisy neighbor “E does not sit next to F”
Between One person in the middle “G sits between H and I”
Two seats apart A gap of one person “J sits two seats away from K”
First/Last seat Front row/Back row “L sits in the first seat”

Tip: Think of the seating as a line of chairs or a circular table. The rules talk about the relative positions, not absolute numbers.


3. Step‑by‑Step Strategy (No Jargon)

  1. Write Down All Rules
    Copy each rule on a single line.
    Example:

    1. A sits next to B
    2. C sits opposite D
    3. E does not sit next to F
    
  2. Choose a Reference Point
    Pick someone or something that has a fixed position (like “first seat” or “middle of the circle”).
    Why? It gives you a starting place.

  3. Place the Fixed Person
    Draw a simple diagram (row or circle).
    Example:

    [A] [ ] [ ] [ ] [ ] 
    
  4. Use “Next to” Rules
    If A is next to B, put B right next to A.
    If there are two options, write both possibilities.

  5. Apply “Opposite” Rules
    For a circle, mark the seat opposite the known seat.
    If the table is a row, “opposite” usually means “in the middle” or “at the end.”

  6. Eliminate With “Not Next To”
    If someone can’t sit next to someone else, cross that out from the options.

  7. Use “Between” Rules
    If G sits between H and I, place G and then put H and I on either side.

  8. Check for Contradictions
    If a rule can’t be satisfied with the current placement, backtrack and try the other option.

  9. Fill in the Rest
    Once all rules are satisfied, the remaining seats go to the remaining people.

  10. Double‑Check
    Read all rules again to ensure none are broken.


4. Tiny Example Puzzle

People: A, B, C, D, E
Rules:

  1. A sits next to B.
  2. C sits opposite D.
  3. E does not sit next to A.
  4. A sits in the first seat.

Solve

  1. Start with A in the first seat (rule 4).

    [A] [ ] [ ] [ ] [ ]
    
  2. A must be next to B (rule 1).
    B can only be in seat 2.

    [A] [B] [ ] [ ] [ ]
    
  3. C opposite D (rule 2).
    In a row of 5, the only seat opposite is seat 3 (middle).
    So C sits in seat 3.

    [A] [B] [C] [ ] [ ]
    
  4. Now D must be opposite C, so D sits in seat 5.

    [A] [B] [C] [ ] [D]
    
  5. Only E is left, so E goes to seat 4.

    [A] [B] [C] [E] [D]
    
  6. Check rule 3: E is not next to A.
    A is in seat 1, E is in seat 4 → they’re not next to each other. ✔️

Final Arrangement

  • 1: A
  • 2: B
  • 3: C
  • 4: E
  • 5: D

5. Quick Tips for Success

Tip Why it Helps
Start with the most restrictive rule (e.g., fixed seat, opposite). Gives you a solid anchor.
Draw a diagram on paper – visualizing is easier than mental math. Helps spot impossible placements.
Write possible options for each seat; cross out when a rule forbids it. Keeps options clear.
If stuck, backtrack to the last decision and try the other option. Avoids endless loops.
After finishing, read every rule once more. Ensures no rule was missed.

6. Practice Problems

  1. People: X, Y, Z, W
    Rules:
    • X sits next to Y.
    • Z sits opposite W.
    • X does not sit next

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