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Live Analysis · UPSC Prelims 2026

CSAT Paper II — X-Ray

80 questions. Every trap named. Every skip signal flagged. CSAT decoded the way no coaching institute bothers to.

Paper Fingerprint — Subject Mix

Quant 30
RC 23
Logic 12
Analytical 8
DI 5
DM 2

The split nobody talks about: Quant + DI = 35 questions. RC + Logic = 35 questions. This is a balanced paper — but Analytical Reasoning has a 62% Red bouncer rate. Know what to skip before you enter the hall.

80Total questions
63%Safe to attemptGreen bouncers
40%Calculation Traps40 of 80 questions
0RC Red bouncersSafest section
Subject Distribution

Questions per section — 2026

Quantitative Aptitude
Caution30q
1758 (27% Red)
Comprehension
Safe23q
2030 (0% Red)
Logical Reasoning
Safe12q
831 (8% Red)
Analytical Reasoning
High-risk8q
305 (63% Red)
Data Interpretation
Caution5q
122 (40% Red)
Decision Making
Safe2q
110 (0% Red)
Difficulty X-Ray — Bouncer Ratings by Section

Green = Attempt · Yellow = Caution · Red = Skip

Analytical Reasoning had a 62% Red rate — more than half those questions were skip signals. Comprehension had zero Red bouncers. This gap defines your CSAT strategy.

● Comprehension — 0 Red Bouncers

Every single RC question was Green or Yellow. If you can read carefully and spot Scope Creep, these 23 questions are the most reliable marks in the paper.

○ Analytical Reasoning — 62% Red Bouncers

5 of 8 Analytical Reasoning questions were skip signals. Multi-step arrangements and spatial puzzles with no shortcut — negative marking risk outweighs expected value.

16 Red Bouncers — These were skip signals in the exam

Q1Algebra — Multi-Variable Inequalities · Quantitative Aptitude
Q3Permutations — Diophantine Partitioning · Quantitative Aptitude
Q4Geometry — Solid Cube Cuts · Analytical Reasoning
Q14Logic — Spatial Match Puzzles · Analytical Reasoning
Q17Time, Speed & Distance — Circular Races · Quantitative Aptitude
Q21Quantitative — Relative Speed & Sound Telemetry · Quantitative Aptitude
Q48Quantitative — Spatial Area Tiling · Quantitative Aptitude
Q49Quantitative — Train Accident Deceleration · Quantitative Aptitude
Q61Data Sufficiency — Diophantine Coin Systems · Data Interpretation
Q64Data Sufficiency — Set Parity Restrictions · Data Interpretation
Q68Logic — Simultaneous Equation Weight systems · Analytical Reasoning
Q70Quantitative — Periodic Step LCM Systems · Quantitative Aptitude
Q74Logic — Circular Seating Arrangements · Analytical Reasoning
Q75Logic — Grid Symmetry & Spatial Patterns · Analytical Reasoning
Q78Logic — Alphanumeric Substring Periodic Patterns · Logical Reasoning
Q79Quantitative — Modular Exponent Prime Factorization · Quantitative Aptitude
Trap Anatomy

67 of 80 questions had a deliberate trap. The Calculation Trap alone appeared in 40% of the entire paper — mostly in Quant. Knowing trap patterns is not an optional insight. It is the difference between attempting and abandoning.

Trap breakdown (67 of 80 questions had a trap)

Calculation Trap32×

Found in: Quant (26×), Logic (2×), DI (2×)

A wrong option is the result of a specific, predictable arithmetic mistake — adding successive discounts instead of compounding, using the wrong base, forgetting a step. Estimate first. Check if option (a) is the 'naive mistake' answer before solving.

Distractor Option11×

Found in: Analytical (3×), Logic (4×), Quant (3×)

A plausible but just-wrong option, often off by one step or one constraint. Common in arrangements and series. Always verify your final answer — don't stop at 'looks right'.

Scope Creep8×

Found in: Comprehension (8×) — exclusively RC

An inference option that goes beyond what the passage actually says. 'Therefore all countries...' when the passage only discussed India. The moment you see 'all', 'always', 'proves that' — eliminate.

Extreme Absolute7×

Found in: Comprehension (7×)

A statement using 'all', 'never', 'every', 'always' — almost always false in RC. Signal words are your shortcut. Spot the absolute word, and the option is almost certainly incorrect.

Skill-Based vs Concept-Based

60% of the paper was pure skill — method, not memory. If you know the technique, you can solve it. The remaining 40% required a specific formula or rule to be learned first.

48
Skill-based
60% of paper

Pure method questions. No formula memorisation needed — just knowing how to approach the problem type. Speed and practice are the prep tools here.

32
Concept-based
40% of paper

Require a specific formula or rule — compound interest, LCM method, syllogism rules, set theory. These are learnable but must be memorised explicitly, not just practised.

Skill vs Concept breakdown by section

Quant
37%skill
RC
100%skill
Logic
50%skill
Analytical
75%skill
DI
0%skill
DM
100%skill
What This Paper Means for Your Prep
🧮

Calculation Trap is everywhere in Quant

26 of 30 Quant questions had a Calculation Trap. The trap option is always 'the naive mistake answer'. Before solving fully, ask: what is the obvious wrong move here? Eliminate that option first.

📖

RC is your safest guaranteed marks

23 questions, 0 Red bouncers, 87% Green or Yellow. Scope Creep is the only RC trap — spot 'all/always/proves' language and you've eliminated the wrong option in seconds. RC is not a weakness area. It's a marks bank.

⚠️

Skip Analytical Reasoning by default

62% of Analytical Reasoning questions were Red bouncers. Enter the exam with a clear rule: attempt Analytical only after finishing all Green/Yellow questions. The 5 Red ones cost you more in time than they're worth.

⚖️

The paper is split 50/50 — but unequal in risk

Quant+DI and RC+Logic are both 35 questions. But Quant+DI has a 29% Red rate. RC+Logic has a 3% Red rate. If you have limited prep time, RC+Logic has a dramatically better return on investment.

Full Paper — Question X-Ray