Pearl Academy – General Awareness & Aptitude
Topic: Reasoning
Reasoning is the skill of drawing logical conclusions from given facts. It is a core component of the aptitude section in most competitive exams, including the Pearl Academy entrance test.
1. Simple Explanation
- Definition: Reasoning is the mental process of connecting premises (facts) to arrive at a conclusion that is logically sound.
- Purpose in Exams: Tests your ability to think critically, spot patterns, and make deductions quickly under time pressure.
- Common Formats:
- Verbal Reasoning – statements, analogy, logical deduction.
- Non‑Verbal Reasoning – puzzles, seating arrangements, series, coding‑decoding, blood‑relation, blood group, time‑based problems.
2. Key Points to Master
| Category | Typical Questions | Key Concept | Strategy |
|---|---|---|---|
| Verbal Reasoning | Statement & Conclusion, Analogy, Logical Sequence | Validity, Logical flow, Common logical fallacies | Read carefully, underline key words, use “if‑then” logic |
| Analogy | A : B :: C : D | Relationship types (synonym, antonym, part‑whole, cause‑effect, etc.) | Identify the relationship first, then match it |
| Logical Sequence | 2, 4, 6, 8, … | Arithmetic pattern, Odd/Even, Fibonacci, etc. | Write out the first few terms, look for common differences |
| Non‑Verbal Reasoning | Seating, Blood‑Relation, Coding‑Decoding, Series, Puzzle, Time problems | Spatial reasoning, Genetics, Algebra, Time arithmetic | Sketch diagrams, use elimination, work backwards |
| Time Management | 40–50 questions in 60 min | Speed, Accuracy | Practice with timed mock tests, focus on easy ones first |
3. Worked Example
Problem (Verbal Reasoning – Statement & Conclusion)
Statement:
- All zebras are brown.
- Some animals that are brown are horses.
- No horse is a zebra.
Conclusion: Some zebras are not horses.
Options
A. Valid
B. Invalid
Solution
-
Restate in set form
- Let Z = zebras, B = brown, H = horses.
-
- Z ⊆ B
-
- Some B ∈ H (∃x (x∈B ∧ x∈H))
-
- H ∩ Z = Ø
-
Deduction
- Since every zebra is brown, any zebra is in B.
- From (3), no zebra can be a horse.
- Therefore, no zebra is a horse → the conclusion “Some zebras are not horses” is always true.
-
Answer: A. Valid
Takeaway:
When a conclusion states a necessary property (e.g., “All Z are not H”), it is valid if the premises logically enforce it.
Problem (Non‑Verbal Reasoning – Seating Arrangement)
Scenario
5 people (A, B, C, D, E) sit in a row.
- A sits next to B.
- C sits to the right of A.
- D sits in the middle seat.
- E sits to the left of C.
Question: Who sits in the 4th seat (from the left)?
Solution
- Place D: Middle seat → seat 3.
- Place A & B: They are adjacent.
- C is to the right of A.
- E is to the left of C.
Try arrangement:
- Seat 1: E
- Seat 2: A
- Seat 3: D
- Seat 4: B
- Seat 5: C
Check constraints:
- A next to B → yes (seat 2 & 4 are not adjacent → wrong).
Re‑try:
- Seat 1: A
- Seat 2: B
- Seat 3: D
- Seat 4: E
- Seat 5: C
Check:
- A next to B → yes.
- C to right of A → yes.
- E left of C → yes.
Answer: E sits in seat 4.
Takeaway: Visualizing the row and using process of elimination helps quickly locate positions.
4. Quick Revision Summary
- Read every statement carefully – underline key words (“all”, “some”, “none”).
- Identify the type of reasoning: analogy, logical sequence, seating, etc.
- Sketch or write out before solving (especially for seating and puzzle problems).
- Look for patterns in numbers: common difference, ratio, alternating, etc.
- Check constraints: adjacency, order, genetic relationships.
- Time Management:
- 1–2 minutes per question → 30 min for 20 questions.
- Skip and return if stuck after 30 sec.
- Aim for 90 % accuracy before final review.
- Practice: Use mock tests, analyze mistakes, and refine strategies.
Remember: Reasoning is all about logical consistency. The clearer you can see the logical chain, the faster and more accurate you’ll be. Good luck!