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General Studies Paper II (CSAT) · Subtopic

Numbers and relations

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

Number questions depend on the domain: integers, fractions and real numbers do not permit the same shortcuts. A factor divides exactly; a multiple is obtained by integer multiplication.

Key ideas

  • integer
  • rational number
  • factor
  • multiple
  • divisibility

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.