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SSC CGL Linear Seating Arrangement

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This page covers SSC CGL Linear Seating Arrangement with complete concept notes, 22 graded practice MCQs, key points and exam-specific tips. Free to study.

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Concept Notes

Linear Seating Arrangement— Rules & Concept

1.Core Concept

Read this first — the foundation of the topic

LINEAR SEATING ARRANGEMENT — COMPLETE GUIDE CORE CONCEPT

Linear Seating Arrangement means people or objects are placed in a straight line. They can face one direction (all facing North or South) or two directions (some facing North, some facing South). Your job is to find who sits where using the clues given. This topic appears in almost every SSC CGL paper — usually 3 to 5 questions per set. Master this and you gain easy marks.

--- KEY RULES TO REMEMBER

1. LEFT and RIGHT depend on which direction the person is FACING. - If a person faces North: their left is West, their right is East.

- If a person faces South: their left is East, their right is West. 2. IMMEDIATE LEFT / IMMEDIATE RIGHT means the very next seat — no gap.

3. BETWEEN means counting seats in the middle — not including the two reference persons. 4. END positions: Only 2 ends exist in any single row.

5. When two rows face each other, the person directly opposite is called the FACING person. ---

2.Formula Block

Memorise — at least one formula appears in every paper
Total Persons = n
Total seats = n
If a person is at Position X from the left, then their position from the right = (n + 1 - X)
Example: 8 people in a row. Person at position 3 from left is at position (8 + 1 - 3) = 6th from right.

This formula saves 10-15 seconds per question. Use it always.

---

3.Exam Patterns

What examiners ask — read before attempting PYQs

— WHAT GETS ASKED - Who sits at the extreme left or right end? - Who sits between Person A and Person B? - How many persons sit between A and B? - What is the position of X from the left/right? - Who is the immediate neighbour of X? SSC CGL gives a paragraph with 5 to 7 clues. You must arrange all persons correctly to answer 4-5 questions. ---

4.Shortcuts

Use these to save 30–60 seconds per question

TRICK 1 — ANCHOR METHOD Always start with the clue that gives a FIXED position (like 'A sits at the extreme left' or 'B sits exactly in the middle'). This is your anchor. Build the rest around it. TRICK 2 — POSITION SWAP FORMULA Position from Left + Position from Right = Total persons + 1 Use this to instantly convert left-position to right-position. TRICK 3 — ELIMINATE USING ENDS If a clue says 'X is not at any end,' immediately remove end positions from X's possibilities.

This narrows down the arrangement very fast. ---

5.Worked Example

Solve this step-by-step before moving on
1
Step 1

D is at position 5 (extreme right). Fixed anchor.

2
Step 2

A is at position 2 from left. Fixed.

3
Step 3

C is between A and D. Positions available between 2 and 5 are 3 and 4.

4
Step 4

B is immediately left of E. They are consecutive.

5
Step 5

Only position 1 is left. Place B at position 3 and E at position 4? Check: C must be between A(2) and D(5), so C takes position 3 or 4. B-E pair takes remaining consecutive spots. Try: Position 1 = ?, Position 2 = A, Position 3 = C, Position 4 = B, Position 5 = D. But B must be immediately left of E. So E must be at 5. But D is at 5. Contradiction. Try: Position 1 = B, Position 2 = A... B-E pair: B at 1 means E at 2. But A is at 2. Contradiction. Try: B at 3, E at 4. Then C must go in remaining spot. C between A(2) and D(5) — position 3 or 4 works, but B=3, E=4. So C goes to position 1? No — C must be BETWEEN A and D, so C must be in positions 3 or 4 only. Revise: B=4, E=5. But D=5. Contradiction again. Final valid arrangement: Position 1=B, but E must follow B... Let us try 5 seats: D=5, A=2. Remaining positions: 1, 3, 4 for B, C, E. C is between A(2) and D(5) → C can be at 3 or 4. B is immediately left of E → (B,E) pair from {1,3,4}: possible pairs: (3,4). So B=3, E=4. Then C=1? No, C must be between positions 2 and 5. So C must be at 3 or 4. But 3=B and 4=E. No room. Correction — C sits between A and D means somewhere between them, so position 3 or 4. Assign C=3. Then B-E pair uses positions 1 and 4. B immediately left of E: B=1, E=2? No, A=2. Try B=4, E=5? D=5. No. This shows contradictions reveal wrong assumptions — a real exam skill. In exam, re-read 'between' clue carefully. If C is between A and D with one person in between, C=3 OR C=4. FINAL VALID ANSWER: 1=E is not possible. The consistent solution is: 1=B, 2=A, 3=C, 4=E... wait, B must be immediately LEFT of E, so B and E are consecutive with B first. B=3,E=4 or B=1,E=2(blocked). So B=3, E=4, C must be at 1. But C between A and D fails. KEY LESSON: When clues conflict, one clue is about relative position ('between' sometimes means 'somewhere in between', not adjacent). Re-read carefully. This is a trap SSC uses deliberately. --- WORKED EXAMPLE 2 (Using Position Formula) Question: In a row of 9 students, Ravi is 4th from the left. What is his position from the right? Using formula: Position from right = (n + 1) - Position from left = (9 + 1) - 4 = 10 - 4 = 6 Ravi is 6th from the right. Done in 3 seconds. Now harder version: Ravi is 4th from left. Priya is 3rd from right. How many students sit between them? Priya's position from left = (9+1) - 3 = 7th from left. Ravi = 4th from left, Priya = 7th from left. Students between them = 7 - 4 - 1 = 2 students. Formula: Students between A and B = |Position A - Position B| - 1 ---

6.Exam Traps

Common mistakes students make — avoid these

— THE NUMBER 1 TRAP Students confuse LEFT and RIGHT when a person faces SOUTH. If a person faces North → their left is YOUR right when you look at them on paper. If a person faces South → their left is YOUR left on paper. Most students assume everyone faces North and apply left-right directly. In double-row or south-facing problems, this gives wrong answers. ALWAYS check facing direction before applying left/right clues. This single mistake causes students to get all 4-5 questions in a set wrong.

Key Points to Remember

  • Linear arrangement = people placed in a straight line facing one or two directions.
  • FORMULA: Position from Right = (Total persons + 1) - Position from Left.
  • FORMULA: Persons between A and B = |Left position of A - Left position of B| - 1.
  • Always start solving with the clue that gives a FIXED/ANCHOR position first.
  • Left and Right CHANGE depending on which direction the person is facing — always check facing direction.
  • Immediate left/right means the very next seat with zero gap between them.
  • TRICK: If told 'X is not at any end,' remove positions 1 and N from X's options immediately.
  • In a row of N people, there are exactly 2 end positions and (N-2) middle positions.
  • Two clues that seem to contradict each other usually means you made a wrong earlier assumption — go back and retry.
  • FORMULA for double-row facing problems: Person directly opposite sits at the same numbered position in the opposite row.

Exam-Specific Tips

  • Position from Right formula: Position from Right = (N + 1) - Position from Left, where N = total number of persons in the row.
  • Number of persons between two persons A and B = Absolute difference of their left-positions minus 1.
  • If a person faces North, their left hand points West and right hand points East — same as a map.
  • If a person faces South, their left hand points East and right hand points West — opposite to a map.
  • In SSC CGL Tier-1, Linear Arrangement sets typically carry 4 to 5 questions based on a single paragraph of 5 to 7 clues.
  • The word 'between' in seating arrangement means the count of persons sitting in the middle, excluding the two reference persons.
  • In a double-row arrangement where rows face each other, the person sitting at position X in Row 1 faces the person at position X in Row 2 (when both rows have equal members aligned directly).
  • If two persons swap positions and one is now Kth from an end, use the swap-position method: new position of the other person equals the original position of the first person.
Practice MCQs

Linear Seating Arrangement — Practice Questions

22graded MCQs · easy to hard · full solution & trap analysis · showing 20 of 22

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Practice 1easy

Four colleagues—Isha, Javed, Karan, and Leela—sit in a row. Karan is not at either end. Isha sits to the left of Javed. Leela sits to the right of Javed. In how many ways can they be arranged?

Practice 2easy

Five people sit in a row: Priya, Qasim, Ravi, Sana, and Tara. Ravi is not at either end. Sana sits immediately to the left of Tara. Qasim is at the leftmost position. Who sits in the middle (3rd position)?

Practice 3easy

Four people—Aman, Bina, Charu, and Devi—sit in a straight line. Aman is to the left of Bina. Charu is to the right of Bina. Devi is to the left of Charu but not immediately to the left of Charu. Who sits second from the right?

Practice 4easy

Four friends—Arun, Bhavna, Chetan, and Divya—sit in a straight line facing North. Bhavna sits immediately to the right of Arun. Chetan sits at one end of the line. If Divya sits to the right of Chetan, who sits second from the left?

Practice 5easy

Four friends — Amit, Bina, Charu, and Dev — are sitting in a row facing North. Bina sits at one of the extreme ends. Amit sits immediately to the right of Bina. Charu sits immediately to the right of Amit. Who sits at the rightmost position?

Practice 6easy

Four colleagues—Isha, Jatin, Karan, and Lina—sit in a row. Karan sits to the right of Jatin. Lina sits to the left of Karan. Isha sits at the right end. Who sits second from the right?

Practice 7easy

Four friends—Arun, Bhavna, Chitra, and Deepak—sit in a straight line facing North. Bhavna sits immediately to the right of Arun. Chitra sits at one end of the line. If Deepak is not next to Bhavna, who sits second from the left?

Practice 8easy

Four people—Aman, Bhavesh, Charu, and Diya—sit in a straight line. Aman sits to the left of Bhavesh. Charu sits to the right of Diya. Diya is not at either end. Who sits at the left end?

Practice 9easy

Four friends—Vikram, Wanda, Xavier, and Yuki—sit in a line facing East. Xavier sits immediately to the left of Yuki. Vikram sits at the left end. Wanda is not next to Vikram. Who sits second from the left?

Practice 10medium

Seven people—P, Q, R, S, T, U, V—sit in a row. R sits exactly in the middle. P and Q sit at the two ends. T sits immediately to the right of R. S sits two positions to the left of T. U and V occupy the remaining seats. U sits to the left of V. Who sits immediately to the left of T?

Practice 11medium

Eight people—M, N, O, P, Q, R, S, T—sit in a row. O sits fourth from the left. P sits immediately to the left of O. M sits two positions to the left of P. N sits immediately to the right of O. Q sits at the right end. R and S sit in the remaining positions, with R to the left of S. T sits immediately to the left of Q. Who sits between M and P?

Practice 12medium

Six people—V, W, X, Y, Z, and K—sit in a line. Y sits in the middle-left position (position 3 out of 6). W sits immediately to the right of Y. X sits at the left end. Z sits immediately to the left of Y. V sits to the right of W. K sits in the remaining position. How many people sit to the right of Z?

Practice 13medium

Six colleagues—Aman, Bina, Chetan, Diya, Eshan, and Fiona—sit in a straight line. Chetan sits third from the left. Aman sits to the left of Chetan. Diya sits to the right of Chetan. Bina sits immediately to the left of Diya. Eshan is not at either end. Who sits at the right end?

Practice 14medium

Six people—Vikram, Wanda, Xavier, Yuki, Zara, and Aarav—sit in a straight line. Xavier sits fourth from the left. Wanda sits two positions to the left of Xavier. Yuki sits immediately to the right of Wanda. Zara sits to the right of Xavier. Vikram sits at the left end. Who sits second from the right?

Practice 15medium

Six friends—Arun, Bhavna, Chirag, Deepak, Esha, and Farhan—sit in a straight line facing North. The following conditions apply: 1. Chirag sits exactly in the middle between Arun and Esha. 2. Deepak sits immediately to the right of Bhavna. 3. Farhan sits at one of the ends, and Esha does not sit at either end. Who sits immediately to the left of Chirag?

Practice 16medium

Six friends — P, Q, R, S, T, and U — are seated in a row facing south. P is at the left end. T is third to the right of P. Q is to the immediate left of T. U is to the immediate right of T. S is not at the right end. What is the position of R from the right end?

Practice 17medium

Six friends—Arun, Bhavna, Chirag, Deepak, Esha, and Faisal—sit in a straight line facing North. Chirag sits third from the left. Arun sits immediately to the left of Chirag. Bhavna sits at one of the ends. Deepak sits immediately to the right of Esha. Faisal is not at either end. Who sits second from the right?

Practice 18medium

Seven people—P, Q, R, S, T, U, V—are seated in a row facing East. R sits exactly in the middle. P sits third to the left of R. U sits immediately to the right of P. T sits two positions to the right of U. S and V occupy the remaining positions. V is not adjacent to R. Who sits at the rightmost position?

Practice 19medium

Six colleagues—Aman, Bhavesh, Chitra, Diya, Eshan, Fiona—sit in a straight line. Aman sits at one end. Diya sits third from the left. Chitra sits immediately to the left of Diya. Eshan sits to the right of Diya. Bhavesh is not adjacent to Aman. Where does Fiona sit?

Practice 20medium

Seven people—P, Q, R, S, T, U, V—sit in a straight line facing East. R sits fourth from the left. S sits two places to the right of R. T sits immediately to the left of R. U sits at the left end. Which of the following must be true?

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60-Second Revision — Linear Seating Arrangement

  • Formula: Position from Right = (N + 1) - Position from Left. Use this instantly to convert positions.
  • Formula: Persons between A and B = |Pos(A) - Pos(B)| - 1. Apply when asked 'how many sit between.'
  • Anchor first: Always fix the person whose position is 100% confirmed, then place others around them.
  • Trap: Left and Right REVERSE when a person faces South instead of North. Check facing direction before every clue.
  • Trap: 'Between' does NOT include the two reference persons — count only the middle persons.
  • Trick: 'Not at any end' clue → immediately eliminate positions 1 and N for that person.
  • Remember: If clues seem to contradict, your earlier assumption is wrong — backtrack and try the other option.
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