A puzzle in SSC CGL Reasoning is a constrained arrangement problem. You are given a set of objects — people, buses, coaches, buildings — and a collection of relational clues. Your job is to reconstruct the exact arrangement from those clues and answer a specific question about one position.
Think of it like solving a jigsaw puzzle, except the pieces are positions and the picture on the box is hidden. Each clue eliminates possibilities until only one arrangement survives.
Here's the analogy that sticks: imagine you're a detective given eyewitness accounts. Each witness saw only part of the scene. Your job is to combine partial, sometimes indirect, observations into one coherent timeline. You don't trust any single clue fully until it is corroborated by others.
Puzzles in CGL appear in three main configurations:
Linear (Row) Arrangements — People or objects in a straight line. Clues involve "left of", "right of", "immediately next to", "between", and "at the extreme end." Watch the facing direction — if people face south, their "right" is your left on paper.
Circular Arrangements — People seated around a table or shape (circle, octagon, hexagon). All face the center unless told otherwise. "Right" and "left" are from the person's perspective, not the diagram's. This is the most common source of wrong answers.
Row/Floor Puzzles — Objects in a queue (buses, coaches) or people on floors of a building. "In front of" and "behind" define the ordering direction. Always establish which end is "front" from the problem text.
What makes puzzles different from other reasoning questions is that you cannot solve them in your head past 4-5 elements. You must draw. A thirty-second sketch — even a rough one — is worth more than two minutes of mental arithmetic. Train yourself to put pencil to paper immediately when you see a puzzle.
The good news: unlike Data Interpretation, puzzles have a guaranteed single correct answer. If your arrangement satisfies every clue simultaneously, you are right. There is no approximation.
Before reading any clue, identify the type:
This takes five seconds and dictates how you draw your base diagram.
For a 5-person linear arrangement, draw five boxes labeled 1 to 5. For a 6-person circular table, draw a hexagon with six nodes. For a classroom with 5 rows, draw five horizontal lines and label "Row 1 (front)" at the top.
This base diagram is your answer sheet. Every clue fills in a node. Once a node is filled, it constrains everything connected to it.
An anchor clue gives an absolute position — it names an endpoint or fixes one element without ambiguity. Examples:
Start with anchor clues. Place those elements first. Everything else chains off them.
After anchors, work from specific to vague:
When a clue says "between A and B" and two positions qualify, place tentatively and check whether the remaining clues resolve the arrangement. If they do, you found the answer. If they lead to a contradiction, switch to the other position.
This trial step rarely takes more than 15–20 seconds because contradictions appear quickly.
All members face the center by default. When person X is seated and faces center:
This is the single most tested trap in circular puzzles. On paper, you look down at the arrangement from above. Clockwise on your diagram = X's right. Memorize this direction once and apply it consistently.
When seats are at corners of an octagon (8 seats), "diagonally opposite" means the person directly across — 4 seats away. Adjacent means one seat away. The geometry is the same as a circular table with 8 seats; the word "octagon" just tells you the shape. Work it identically.
"Behind" means farther from the front. "In front of" means closer to the front (lower row number). "A is behind C, but in front of B" means the row order is: ... C ... A ... B ... from front to back.
Build a chain: convert all "in front of / behind" clues into a single sequence like D < E < C < A < B (where < means "comes before" in row order from front to back).
In any linear puzzle, find the element fixed at an endpoint first (the anchor). Then chain remaining elements relative to it using "immediately right/left" clues. This method builds the arrangement in 3–4 logical steps instead of trying all permutations.
Example: "M is at the front, Q at the back; N is between M and O; P is between O and Q." Anchor M at position 1, Q at position 5. N between M and O means N is at 2 and O at 3. P between O and Q means P at 4. Chain complete: M-N-O-P-Q. Standard trial-and-error: 60–90 seconds. ANCHOR-CHAIN: 20–25 seconds.
For circular arrangement questions, stick this rule: when you draw the arrangement from above, clockwise on your paper = that person's RIGHT. Counter-clockwise = that person's LEFT.
Micro-example: "Rama is on Sushma's right." If Sushma is at the top of your circle, Rama sits one seat clockwise (upper-right on your diagram). This eliminates the most common error — confusing "your right" with "diagram right." One rule, applied consistently, saves 30–45 seconds of re-checking.
For depth/row arrangements, write a single inequality chain before drawing anything.
"A is behind C, in front of B. C is behind E. D is in front of E." Convert: D → E → C → A → B (where → means "in front of"). Now map directly: Row 1 = D, Row 2 = E, Row 3 = C, Row 4 = A, Row 5 = B. This chain-building step takes 15 seconds and makes the diagram trivial. Without it, you spend 60+ seconds redrawing.
For any odd-numbered linear arrangement (5, 7 elements), the middle position is always the ceil(n/2)th element. For 5 elements, middle = 3rd. For 7 elements, middle = 4th.
If the question only asks "who is in the middle," you don't need to fully solve the arrangement — you just need to identify what lands in position 3 (or 4). Fill from both ends toward the center and stop when the middle position is determined. This can cut your solving time by 30–40 seconds on middle-position-only questions.
When a row of people faces south, their left-right is the opposite of what you naturally draw on paper (where north is up and east is right). Substitute: "facing south, right = west = left on your diagram."
Micro-example: "Standing in a row facing south. David is at the extreme right end." On your diagram, place David at the extreme LEFT. Then apply all other clues consistently. Forgetting this flip is responsible for roughly one wrong answer per mock in linear puzzles involving directions. The substitution takes 3 seconds and prevents a 100% error.
When you see a puzzle in the exam hall, run through this decision tree:
Is it linear or circular? Draw the appropriate base immediately — boxes in a line or nodes on a polygon. Do not read further clues until you have a blank diagram in front of you.
Find the anchor clue. Scan for "extreme left/right," "front," "back," "first row," "last floor." Place that element first.
Identify direct-neighbor clues next. "Immediately right/left of" clues chain quickly off the anchor.
Handle "between" and "gap-count" clues last. These often resolve ambiguity left by step 3.
If two valid placements remain, pick one, fill the remaining elements, and check all clues in 10–15 seconds. A contradiction will appear fast.
For circular "facing" questions, confirm your clockwise = right rule before answering.
Total target time for a 5-element puzzle: under 90 seconds. For a 7-element puzzle: under 2.5 minutes. If you are past those marks, mark your best guess and return — these questions reward speed-accuracy balance more than persistence.
Why this question: This classroom row puzzle is the cleanest example of the chain-building technique. It tests whether you can convert "in front of / behind" language into a strict sequence.
Solving path: Write each clue as a chain segment. "D is in front of E" → D → E. "E is in front of C" → E → C. "C is in front of A" → C → A. "A is in front of B" → A → B. Combine: D → E → C → A → B. Rows 1–5: D, E, C, A, B = DECAB.
Why this question: The octagon circular arrangement tests whether you correctly handle "diagonally opposite" (4 seats away) and "left/right" from each person's perspective while facing inward.
Solving path: Draw an octagon with 8 numbered nodes. Anchor: Mahima and Rama are diagonally opposite (4 seats apart). Rama is on Sushma's right — seat Rama one position clockwise from Sushma. Ravi is next to Sushma on the other side. Girdhar is opposite Ravi. Girdhar is on Chandra's left — Chandra is one seat clockwise from Girdhar. Savitri is opposite Shalini. With the remaining seat, Ravi falls to Sushma's right (confirmed by the question's answer).
Why this question: This circular direction puzzle combines seating arrangement with compass facing — two skills in one question. It's representative of the slightly harder CGL puzzle variant.
Solving path: Place 5 boys on a circle. A faces SW, D faces SE. B is opposite A — so B faces NE. E is opposite D — so E faces NW. C is equidistant between D and B, meaning C sits at the midpoint arc between D and B. D faces SE and B faces NE; the midpoint of that arc faces East. So C faces East.
Why this question: A 5-element linear queue with two anchor clues. Demonstrates how "middle" questions resolve the moment you build the full chain.
Solving path: Anchor M at front (position 1), Q at back (position 5). N is between M and O → N at 2, O at 3. P is between O and Q → P at 4. Full order: M-N-O-P-Q. Middle = position 3 = O.
Why this question: Another 5-element linear arrangement, but this time all clues are relative (no absolute anchor at first glance). Tests whether you can chain multiple "left of / right of" clues correctly.
Solving path: From "R is to the right of M" → M...R. From "R is to the left of P" → M...R...P. From "L is to the right of P" → M...R...P...L. From "L is to the left of O" → M...R...P...L...O. Full order left to right: M-R-P-L-O. Middle = position 3 = P.
Why this question: This question carries a direction trap — people face south, so their right is west, which is left on your diagram. It tests the facing-south flip explicitly.
Solving path: Facing south: right = west = left on your diagram. Place David at the extreme right end of the row (on paper: leftmost box). Shekhar is immediately right of Dhanush (on paper: immediately left). Bala is between Basha and Dhanush. This gives the arrangement on paper left-to-right: David, Shekhar, Dhanush, Bala, Basha. Middle (position 3) = Dhanush.
Why this question: A 7-element linear arrangement with a gap-count clue ("three persons between G and B"). This is the hardest variant in this set — it requires both chaining and gap-counting simultaneously.
Solving path: "Three persons between G and B" means G and B are in positions (1,5), (2,6), or (3,7). "D is to the right of G" and "C is between A and B" and "E is between F and D" provide further constraints. Testing G at position 1: three persons between G and B puts B at position 5. C is between A and B — C at 4, A at 6 or A at 4, C at 6. E is between F and D, and D is right of G. Working through: G-F-E-D-B-C-A satisfies all clues. G is at the extreme left.
Why this question: Circular table with 6 people — tests "opposite" (3 seats away) and "between" simultaneously. A clean example of building the circular diagram node by node.
Solving path: 6 seats on a circle; opposite = 3 seats away. F is opposite E and between A and D: place F at node 1, E at node 4. F is between A and D: A at node 6, D at node 2 (or vice versa). C is to the right of E and opposite A. E is at node 4, C one seat clockwise = node 5. C opposite A means A is at node 2 — so D is at node 6 and A is at node 2. Remaining: B at node 3. Neighbors of A (node 2): node 1 = F, node 3 = B. Answer: B and F.
Ignoring the facing direction in linear rows. When people "face south," their right is to the west. If you don't flip your diagram axis, you will get mirror-image arrangements and wrong answers. Always note the facing direction before placing anyone.
Confusing clockwise with "my right" in circular arrangements. When you look down at a circular diagram, clockwise on the paper equals the seated person's right (since they face inward). Reversing this single relationship inverts every left/right clue in the puzzle.
Not distinguishing "immediately right/left" from "somewhere to the right/left." "Shekhar is immediately right of Dhanush" means adjacent. "D is to the right of G" only means D is somewhere to G's right — they need not be adjacent. Treating a non-adjacent clue as adjacent creates contradictions you'll waste time trying to resolve.
Skipping the base diagram because the puzzle looks easy. Five-element puzzles are the most common source of careless errors precisely because people try to solve them mentally. Draw even for three-element arrangements — it costs 10 seconds and prevents flip errors.
Placing "between A and B" without testing both sub-cases. "Between A and B" means the element can be in the A...X...B or B...X...A order depending on what other clues establish. Don't assume the alphabetical order matches the positional order.
Treating "opposite" uniformly without counting seats. In a 6-person circle, opposite = 3 seats away. In an 8-person octagon, opposite = 4 seats away. In a 4-person square, opposite = 2 seats away. Always count: seats_total / 2 = distance to opposite seat.