Mental Ability & Reasoning

Logical reasoning and numerical ability β€” the aptitude component of the Prelims paper.

🧠 Logical Reasoning

Covers deductive, inductive and abductive reasoning through four classic question types: Statement and Assumptions, Statement and Argument, Statement and Conclusion, and Statement and Courses of Action. These test whether you can correctly separate what logically follows from a statement versus what merely seems plausible.

🔢 Mental Ability (Pattern-Based Reasoning)

  • Number series & Letter series — identifying the pattern to find the next term.
  • Odd Man Out — spotting the item that breaks a group's pattern.
  • Coding-Decoding — letter/number substitution ciphers.
  • Problems relating to Relations — blood relations and family-tree puzzles.
  • Shapes and their sub-sections — visual/spatial reasoning.

🔢 Basic Numeracy

Number system fundamentals, order of magnitude, averages, ratio and proportion, percentage, simple and compound interest, time and work, time and distance, and data analysis — reading and interpreting tables, bar diagrams, line graphs and pie charts.

πŸ’‘ Key Facts

  • This is a speed-and-accuracy section — timed practice matters more than new theory at this stage.
  • Statement-based reasoning (Assumptions/Arguments/Conclusions/Courses of Action) has a specific logical grammar each type follows; don't rely on general intuition alone.
  • Data Interpretation questions reuse the same table/chart across 3–5 questions — read the chart once, carefully, before answering the set.
  • Time & Work and Time & Distance problems are highly formulaic; a small set of standard formulas covers most questions.

πŸ”– 60-Second Revision

  • Logical reasoning: assumptions, arguments, conclusions, courses of action.
  • Mental ability: series, odd-man-out, coding-decoding, relations, shapes.
  • Numeracy: number system, averages, ratio/%, SI/CI, time-work/distance.
  • Data Interpretation: tables, bar/line graphs, pie charts.

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