Linear Seating Arrangement

In a SINGLE ROW, all persons sit in one line facing the SAME direction (usually North or South). With NORTH-facing people, your LEFT is their right — so 'left of' means moving toward higher serial. With SOUTH-facing, it reverses: their left is YOUR right. Speed trick: write N or S above your diagram and freeze the left/right rule before placing anyone. In a DOUBLE ROW, two rows face EACH OTHER (one North-facing, one South-facing). Persons in opposite rows 'face' each other, so a clue like 'A faces B' links the two rows. Always draw two parallel lines and mark facing arrows first. For Clerk level, rows are usually 5 or 6 people each — manageable.

Memory aid for facing direction: 'NLR-Same as us only for South.' Practically — when a person faces NORTH, their LEFT = your RIGHT side of the page and their RIGHT = your LEFT. When facing SOUTH, their left/right MATCHES your view. Misreading this single rule causes 60% of wrong puzzle answers. Quick drill: 'P is 3rd to the left of Q' — fix Q, then count toward the side that is P's described direction. Always restate the clue as 'positions between' (here, exactly 2 people sit between P and Q). Converting 'nth to the left/right' into 'gap = n-1 persons' speeds elimination dramatically in the exam.

Six friends A-F sit in a row facing North. C is 2nd from the left end. A is immediate right of C. There are two people between A and F. B sits at the right end. Solve: Positions L1-L6. C=L2, A=L3 (immediate right). Two between A and F means F=L6, but B is right end (L6) — contradiction, so F=L6 fails; instead count F to the right: A=L3, gap 2 ⇒ F=L6 only option left blocked by B, so re-check: 'two people between' = F at L6 OR F at L0(invalid). Hence B=L6, and the remaining D,E,F fill L1,L4,L5. This shows why you lock end-clues (B=L6) FIRST, then fill fixed gaps.

In IBPS Clerk Prelims, Puzzles & Seating is the single biggest scorer in Reasoning — often 15–20 of the 35 marks come from seating and puzzle sets. Linear arrangement is the friendliest of these: people sit in one straight row (all facing one way) or two parallel rows facing each other. A clerk aspirant who fixes the facing-direction rule and works the "sure" clues first can clear a 5-mark set in 4–5 minutes.

The setup

A single row has everyone facing North (or all facing South). A double row has one row (say facing North) sitting opposite another row (facing South), so each person faces exactly one person in the other row.

The whole game is left/right, and that depends on facing direction:

Facing	Person's LEFT is	Person's RIGHT is
North	paper-left (west)	paper-right (east)
South	paper-right (east)	paper-left (west)

So for a North-facing row, "P is to the right of Q" means P is on the paper-right of Q. For a South-facing row it flips. In a double row the two rows have opposite left/right, and people sitting opposite each other face one another.

Method

1. Draw fixed slots (e.g. 8 seats, mark ends).
2. Place definite clues first: "sits at an end", "exactly 3 between X and Y", immediate neighbours.
3. Keep floating clues (gap-only, no anchor) aside; slot them once an anchor appears.

Exam Tricks & Tips

• 🎯 "Exactly N persons between X and Y" means their seat numbers differ by N+1 — a 2-second gap check.
• 🎯 For South-facing rows, silently swap "left" and "right" as you read each clue.
• 🎯 Start from an end clue — ends have only one neighbour, so they lock fastest.
• 🎯 Count total persons and seats first; a "not at the end" clue is often the deciding pin.
• 🎯 In double rows, use "faces" clues to bridge the two rows — one placement fixes two people.
• ❌ Common mistake: reading "immediate left" without checking facing — placing North-row people with South-row logic loses the whole set.

Expected exam pattern

One 5-question set of 6–8 people in a single or double row, sometimes with a second variable (city, age, subject). Questions ask "who sits at the extreme end", "who is 2nd to the left of X", "how many sit between", and one odd-one-out based on position.

Quick recap

Fix facing → apply the left/right table → place definite clues → resolve the row. Speed comes from anchoring at ends and treating "N between" as a +1 gap.

Cover the answer, recall, then check. 11 cards on linear seating essentials.

Q1. In a North-facing row, "P sits to the right of Q" — where is P on paper?
A1. On the paper-right (east) side of Q. For North-facing, person's right = paper right.

Q2. In a South-facing row, which way does "left" point on paper?
A2. Paper-right (east). South-facing flips left/right versus North-facing.

Q3. "Exactly 4 persons sit between M and N." How far apart are their seat numbers?
A3. 5 seats apart (gap = persons between + 1).

Q4. In a double row, how are the two rows oriented?
A4. One row faces North, the other faces South; each person faces exactly one person opposite.

Q5. Why start placing from an "end" clue?
A5. An end seat has only one neighbour, so it locks with the least ambiguity.

Q6. A person sits "3rd from the left end" in an 8-seat row. What position from the right?
A6. 6th from the right (8 − 3 + 1 = 6).

Q7. In a double row, if A faces B and B is 2nd from left of his row, what fixes A?
A7. A sits opposite B, so A is the corresponding 2nd seat of the other row (its left/right is mirrored).

Q8. What is a "floating" clue and how do you handle it?
A8. A gap-only clue with no fixed anchor. Set it aside until an anchored person gives it a reference point.

Q9. "Immediate neighbours of X" — how many can X have at most, and where does X have only one?
A9. At most two; only one when X is at an end.

Q10. Fastest first step for any linear set?
A10. Count persons vs seats and note facing direction before reading positional clues.

Q11. Trap in mixed double-row sets when a clue says "second to the left"?
A11. Left/right differs per row because rows face opposite ways — apply the correct row's orientation.