CGL — General Intelligence & Reasoning: Venn Diagrams
Practice these 20 carefully selected MCQs on Venn Diagrams for CGL 2026.
Each question includes the correct answer and a clear explanation.
Practising MCQs regularly is the best way to improve speed and accuracy.
Instructions
- Attempt all questions without looking at answers first.
- Time yourself: target 1 minute per question.
- Review explanations for every wrong answer.
Q1. Which Venn diagram represents: Dogs, Animals, Stones?
- A. Two concentric circles + one separate
- B. Three separate circles
- C. Three overlapping circles
- D. Two overlapping + one separate
Answer: A — Dogs ⊂ Animals (concentric). Stones are separate.
Q2. Select diagram for: Mothers, Women, Human Beings.
- A. Concentric: Human Beings > Women > Mothers
- B. Three separate
- C. Two overlapping
- D. Human Beings and Women overlap, Mothers separate
Answer: A — All Mothers are Women; all Women are Human Beings. So concentric.
Q3. Which diagram suits: Books, Notebooks, Stationery?
- A. Concentric: Stationery > Books > Notebooks is wrong; Stationery > {Books, Notebooks} with Books and Notebooks overlapping
- B. Three separate circles
- C. Books and Notebooks fully overlap
- D. All three fully overlap
Answer: A — Books and Notebooks are both Stationery but overlap partially.
Q4. Doctors, Teachers, Men — best Venn diagram?
- A. Three circles with partial overlaps
- B. Three concentric
- C. Two concentric + one separate
- D. None
Answer: A — A person can be Doctor+Teacher+Man, or any combination — partial overlaps.
Q5. If all A are B and no C is B, the Venn diagram shows:
- A. A inside B, C outside B
- B. A outside B, C inside B
- C. A overlaps C
- D. None
Answer: A — A ⊂ B, C and B are disjoint → C is outside B, and outside A too.
Q6. Cats, Lions, Animals — which diagram is correct?
- A. Cats ⊂ Animals, Lions ⊂ Animals, Cats ∩ Lions = ∅
- B. All three overlapping
- C. All three concentric
- D. None
Answer: A — Both cats and lions are animals, but cats and lions are different species.
Q7. Triangles, Squares, Polygons — best diagram?
- A. Triangles and Squares inside Polygons, non-overlapping
- B. Three overlapping
- C. Three separate
- D. None
Answer: A — Both triangles and squares are polygons, but distinct types.
Q8. Some A are B. Some B are C. No A is C. Best diagram?
- A. A and B overlap; B and C overlap; A and C separate
- B. All three overlapping
- C. All three separate
- D. A inside B and C
Answer: A — Some A∩B, some B∩C, but A and C do not overlap.
Q9. Manager, Employee, Female — which Venn diagram?
- A. Three circles with partial overlaps
- B. Two concentric + one separate
- C. All three concentric
- D. None
Answer: A — A person can be female+manager+employee. All three can intersect partially.
Q10. Hockey players, Cricket players, Sportspersons — correct diagram?
- A. Hockey and Cricket inside Sportspersons, with possible overlap between Hockey and Cricket
- B. Three separate
- C. Cricket inside Hockey
- D. None
Answer: A — All players are sportspersons; some may play both.
Q11. Which set of 3 is best shown by three fully separate circles?
- A. Sun, Moon, Stars
- B. Vegetables, Potatoes, Food
- C. Sparrows, Birds, Animals
- D. Boys, Students, Humans
Answer: A — Sun, Moon, Stars are completely different categories with no overlap.
Q12. If no X is Y, and some Y are Z, the correct diagram shows:
- A. X and Y separate; Y and Z overlap
- B. X inside Y
- C. All three overlapping
- D. None
Answer: A — X∩Y=∅, Y∩Z≠∅.
Q13. All birds have feathers. Some animals are birds. Correct Venn diagram?
- A. Birds ⊂ Animals; Birds ⊂ Feathered things
- B. All three separate
- C. Birds outside Animals
- D. None
Answer: A — Birds are a subset of animals and all birds are in feathered set.
Q14. Pens, Ink, Stationery — correct diagram?
- A. Pens ⊂ Stationery; Ink ⊂ Stationery; Pens ∩ Ink = ∅
- B. All overlapping
- C. Pens inside Ink
- D. None
Answer: A — Both pens and ink are stationery but they are different things.
Q15. Which best represents: Graduates, Engineers, Lawyers?
- A. Graduates is large; Engineers and Lawyers are subsets with possible overlap
- B. All separate
- C. All concentric
- D. None
Answer: A — Not all graduates are engineers or lawyers, but both can be graduates.
Q16. A survey shows: 40 like Tea, 30 like Coffee, 15 like both. How many like only Tea?
Answer: A — Only Tea = 40 - 15 = 25.
Q17. In a class of 50: 30 play cricket, 20 play football, 10 play both. Play neither?
Answer: A — Total playing at least one = 30+20-10=40. Neither = 50-40=10.
Q18. All P are Q. Some Q are R. Best Venn diagram?
- A. P ⊂ Q; Q and R partially overlap; P may or may not overlap R
- B. All three overlapping fully
- C. P outside Q
- D. None
Answer: A — P inside Q; R overlaps Q partially.
Q19. Athletes, Sprinters, Swimmers — if some athletes are sprinters and some are swimmers:
- A. Three overlapping circles
- B. Sprinters and Swimmers inside Athletes
- C. All separate
- D. None
Answer: A — Some athletes are sprinters, some are swimmers — partial overlaps.
Q20. Correct Venn for: Planets, Earth, Natural Satellites?
- A. Earth ⊂ Planets; Natural Satellites separate
- B. All three overlapping
- C. All separate
- D. None
Answer: A — Earth is a planet; natural satellites (like Moon) are not planets.
Exam Tips for Venn Diagrams
- Regular practice of 20+ questions daily builds speed and accuracy.
- Review your mistakes — understanding why you got it wrong is crucial.
- Attempt this topic in full mock tests under timed conditions.
