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General Studies Paper II (CSAT) · Topic

Basic numeracy and data interpretation

Official syllabus

Basic numeracy (numbers and their relations, orders of magnitude, etc.) (Class X level), Data interpretation (charts, graphs, tables, data sufficiency etc. — Class X level);

UPSC CSE 2026 notification

What this covers

Use quantities with units, ratios and evidence from a displayed dataset. Calculate only after identifying the denominator, comparison period and what the question actually asks.

Key ideas

  • Numbers and relations
  • Orders of magnitude
  • Arithmetic and proportional reasoning
  • Charts graphs and tables
  • Data sufficiency

Subtopics 5

  1. 01Numbers and relationsNumber questions depend on the domain: integers, fractions and real numbers do not permit the same shortcuts.
  2. 02Orders of magnitudeOrder of magnitude describes approximate scale, often through powers of ten.
  3. 03Arithmetic and proportional reasoningA proportion compares two ratios. A percentage names a fraction of a specified base; an average compresses observations and may hide their…
  4. 04Charts graphs and tablesA chart encodes quantities through labels, scales and visual marks.
  5. 05Data sufficiencyData sufficiency asks whether supplied statements determine an answer, not necessarily what the numerical answer is.

Official wording is from UPSC's Civil Services Examination 2026 notification, the current baseline for CSE 2027 preparation. Always check the latest notification at upsc.gov.in. Scopes and key ideas are CSE One's study map and are being expanded.