Logical Reasoning and Analytical Ability: Structure, Not Guesswork
Question Families
Series (number, letter, mixed), analogies, classification (odd one out), coding-decoding, blood relations, direction sense, syllogisms, seating and ranking arrangements, calendars and clocks, and statement-conclusion or assumption questions.
Diagram First
For blood relations and direction sense, draw a small sketch. For seating arrangements, fix the certain position first, then place others relative to it. For syllogisms, use Venn diagrams and apply only the standard rules - do not import real-world knowledge.
Coding-Decoding
Identify the shift pattern (position plus or minus a constant, reversal, or letter-pair substitution) using the first two examples, then verify on the third before applying.
Traps
- Reversed relations: 'brother of my father's only son' is the speaker himself, not an uncle.
- Syllogism overreach: a possibility conclusion differs from a definite conclusion.
- Assumption questions: an assumption must be necessary, not merely plausible.
- Series with two interleaved patterns: check alternate terms separately.
Rule of Thumb
In syllogisms, accept a conclusion only if it holds in every possible Venn arrangement of the premises.
Worked Example
All clerks are officers. Some officers are auditors. Conclusion: some clerks are auditors. Drawing the diagram, the auditors who are officers need not include any clerk, so the conclusion does not follow. Answer: does not follow.