Linear and circular arrangement problems solved by building the seating diagram clue-by-clue — SSC's most elaborate reasoning topic.
📖 ~14 min read🧩 SSC Reasoning
Introduction
Seating Arrangement gives a set of clues about where people sit (in a row or around a table) and asks you
to determine the complete arrangement — the diagram-building approach is essential here; attempting it
purely mentally leads to errors almost every time.
Six people (A-F) seated around a circular table, all facing the centre — moving clockwise from A gives the seating order A→B→C→D→E→F.
Key Rules — Facing Centre vs Facing Outward
Setup
Left/Right Direction Effect
All facing the centre
Clockwise = to your left; Anticlockwise = to your right (directions feel reversed from an outward view)
All facing outward (away from centre)
Clockwise = to your right; Anticlockwise = to your left (matches intuitive outward view)
⚠️ Common Trap: Always confirm from the question whether people are facing the centre or facing outward — this single detail flips every "left/right of" clue in the entire problem.
Linear Arrangement Example
Q. Five friends P, Q, R, S, T sit in a row facing North. Q sits second from the left. R sits immediately to the right of Q. T sits at the extreme right. S sits between R and T. Where does P sit?
Position 1: ?, Position 2: Q, Position 3: R (immediately right of Q)
T is at extreme right → Position 5: T
S is between R and T → Position 4: S
Remaining position 1: P (P sits at the extreme left, 1st position)
Circular Arrangement Example
Q. Six people sit around a circular table facing the centre. A is to the immediate right of B. C is second to the left of A. Where is C relative to B?
Place B, then A immediately to B's right (clockwise from B, since facing centre)
C is 2nd to the left of A → counting anticlockwise 2 seats from A lands back near B's position
Working through the seat count: C sits immediately to the left of B (adjacent, opposite side from A)
Puzzle-Style Combined Clues
💡 Exam Tip: Start placing people using the most specific clue first (e.g., "sits at the extreme right" or "sits exactly in the middle") rather than relative clues (e.g., "sits to the left of") — anchoring the fixed positions first makes the relative clues much easier to place afterward.
✅ Practice Focus: Facing-centre vs facing-outward left/right reversal · Starting with the most specific/fixed clue · Building the diagram incrementally, clue by clue · Circular counting (clockwise/anticlockwise) for "nth to the left/right" clues.