What Syllogism Questions Test
- Basic two-statement syllogisms
- Multi-statement chains (three or more premises)
- Possibility conclusions ("can be true")
- Either-or (complementary pair) cases
Question bank coverage by sub-pattern
How Syllogism Appears in RRB Group D
Syllogism is part of the General Intelligence & Reasoning section (30% of the RRB Group D syllabus).
Syllogism Solved Examples for RRB Group D
12 exam-pattern syllogism questions from the practice bank, each with a full solution.
Statements: All trees are plants. Some plants are shrubs. Conclusions: I. All trees are shrubs. II. Some shrubs are trees.
- A.Only conclusion I follows
- B.Only conclusion II follows
- C.Both conclusions I and II follow
- D.Neither conclusion I nor II followsCorrect
Solution
The statements indicate that all trees are plants, and some plants are shrubs. However, there is no direct relationship established between trees and shrubs. Therefore, neither conclusion I (All trees are shrubs) nor conclusion II (Some shrubs are trees) can be definitively derived from the given statements.
Statements: No X is Y. Some Y are Z. Conclusions: I. Some X are Z. II. No X is Z. Which of the following is true?
- A.Only conclusion I follows
- B.Only conclusion II follows
- C.Either I or II followsCorrect
- D.Neither I nor II follows
Solution
Statements: No X is Y. Some Y are Z. Because no X is Y, and some Y are Z, it is possible that those Z's that are Y, are not X. Then, it is possible that the remaining Z's are either X or not X. Thus, either Some X are Z or No X is Z. This forms an I-E complementary pair. Therefore, 'Either I or II follows' is the correct answer.
In the proposition 'No dogs are birds', which term(s) is/are distributed?
- A.Dogs only
- B.Birds only
- C.Both Dogs and BirdsCorrect
- D.Neither Dogs nor Birds
Solution
In a Universal Negative (E-type) proposition like 'No dogs are birds', both the subject ('dogs') and the predicate ('birds') are distributed. The statement refers to all dogs and denies that any of them are birds, and it also implicitly refers to all birds and denies that any of them are dogs.
Based on the logical principles of Reverse Syllogism & Coded Syllogism, determine the valid outcome or relationship.
- A.Neither Conclusion I nor Conclusion II follows
- B.Conclusion II follows logically from the given premise
- C.Both Conclusion I and Conclusion II follow logically
- D.Conclusion I follows logically from the given premiseCorrect
Solution
In Reverse Syllogism & Coded Syllogism, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
Based on the logical principles of Complementary Pairs and Either-Or, determine the valid outcome or relationship.
- A.Both Conclusion I and Conclusion II follow logically
- B.Neither Conclusion I nor Conclusion II follows
- C.Conclusion II follows logically from the given premise
- D.Conclusion I follows logically from the given premiseCorrect
Solution
In Complementary Pairs and Either-Or, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
Based on the logical principles of Possibility Cases, determine the valid outcome or relationship.
- A.Conclusion I follows logically from the given premiseCorrect
- B.Both Conclusion I and Conclusion II follow logically
- C.Neither Conclusion I nor Conclusion II follows
- D.Conclusion II follows logically from the given premise
Solution
In Possibility Cases, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
Statements: Some cars are not bikes. All scooters are bikes. Conclusions: I. Some cars are not scooters. II. No scooter is a car.
- A.Only conclusion I followsCorrect
- B.Only conclusion II follows
- C.Both conclusions I and II follow
- D.Neither conclusion I nor II follows
Solution
Since some cars are not bikes and all scooters are bikes, it follows that some cars are not scooters. However, we cannot definitively conclude that no scooter is a car, as some cars might still be scooters. Only conclusion I follows.
Which of the following is a complementary pair (NTPC Comp Pair 2)?
- A.'Some M are N' and 'No M is N'Correct
- B.'All M are N' and 'No M is N'
- C.'All M are N' and 'All N are M'
- D.'Some M are N' and 'Some N are M'
Solution
An I-type and E-type proposition sharing the same subject and predicate form a complementary pair.
Statements: All tracks are rails. All rails are metal. No metal is plastic. (NTPC Multi-Syl 8) Conclusions: I. No track is plastic. II. Some metal are tracks.
- A.Both conclusions I and II followCorrect
- B.Only conclusion I follows
- C.Only conclusion II follows
- D.Neither follows
Solution
Tracks are metal, which has no intersection with plastic. No track is plastic (true) and Some metal are tracks (true). Both follow.
Based on the logical principles of Complementary Pairs & Either-Or, determine the valid outcome or relationship.
- A.Conclusion II follows logically from the given premise
- B.Neither Conclusion I nor Conclusion II follows
- C.Conclusion I follows logically from the given premiseCorrect
- D.Both Conclusion I and Conclusion II follow logically
Solution
In Complementary Pairs & Either-Or, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
Statements: 'All A are B. Some B are C.' Which of the following conclusions *definitely* follows?
- A.Some A are C.
- B.All A are C.
- C.Some C are A.
- D.None of these.Correct
Solution
Draw a Venn diagram. 'All A are B' means A is inside B. 'Some B are C' means B and C overlap. There's no definite relationship established between A and C. A could be completely outside C, or have a partial overlap. Thus, none of the provided conclusions necessarily follow.
Statements: Some pencils are erasers. All erasers are sharpeners. Conclusions: I. Some sharpeners being pencils is a possibility. II. No sharpener is a pencil is a possibility.
- A.Only conclusion I followsCorrect
- B.Only conclusion II follows
- C.Both I and II follow
- D.Neither I nor II follows
Solution
Since some pencils are erasers and all erasers are sharpeners, some sharpeners are definitely pencils. Thus, the possibility that 'some sharpeners being pencils' exists. However, it's not possible that 'no sharpener is a pencil' because we know some sharpeners are pencils. Therefore, only conclusion I follows.
Syllogism — Frequently Asked Questions
What is the fastest method for syllogism questions?
Venn diagrams — draw the minimal diagram the statements force, and test each conclusion against it. For "possibility" conclusions, ask instead whether ANY valid diagram allows it.
When does an either-or answer apply?
When two conclusions are individually not certain but form a complementary pair — same subject and predicate, covering all cases between them (e.g. "some" + "no"). Then "either I or II follows".
How many Syllogism practice questions does Parikshala have for RRB Group D?
103 exam-pattern Syllogism questions for RRB Group D Reasoning, each with a step-by-step solution. Practice is free — no sign-up needed to start.