Chapter 20 of 22

Decision Making

Rule-based eligibility puzzles — apply a fixed set of criteria step-by-step to reach the correct decision.

📖 ~4 min read 🧠 RRB NTPC / Group D — Reasoning

Solving Approach

  • List every criterion as a separate, numbered condition before looking at the candidate's data
  • Check the candidate against each condition in order — don't skip ahead
  • Note exception clauses separately — they usually override the general rule
💡 Example: Eligibility needs age 21-58 and income >₹3,00,000, with a co-applicant required if income is ₹3-4 lakh. A 35-year-old with ₹3.5 lakh income and no co-applicant fails the third condition despite passing the first two.
⚠️ Passing the general conditions doesn't guarantee approval if a specific conditional clause still applies.

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