Syllogism – Rules & Venn Diagram Shortcut Method
Syllogism questions test logical reasoning using statements and conclusions. Use rules and Venn diagrams for accuracy.
1. Basic Concept
Statements are given, and conclusions must be evaluated logically.
Example:
All A are B
All B are C
2. Venn Diagram Method
Represent statements using circles.
A ⊂ B ⊂ C
This helps to verify conclusions visually.
3. Important Rules
- All A are B → A inside B
- No A is B → separate circles
- Some A are B → overlapping circles
- Some A are not B → partial outside
4. Standard Conclusions
Example:
All A are B
All B are C
- All A are C → True
- Some C are A → True
Tough Problems
Q1:
Statements:
All cats are animals
All animals are mammals
Conclusion:
All cats are mammals
Solution:
True
Q2:
Statements:
Some A are B
Some B are C
Conclusion:
Some A are C
Solution:
Cannot be determined
Q3:
Statements:
No A is B
All B are C
Conclusion:
Some C are not A
Solution:
True
Exam Strategy
- Use Venn diagram for every question
- Do not assume extra information
- Check each conclusion separately
- Practice different cases
Shaktimatha Learning
Reasoning • Bank Exams • Competitive Preparation
Reasoning • Bank Exams • Competitive Preparation
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