IDAT Logical Reasoning 1 — Questions and Answers
Question 1: What is a syllogism in logical reasoning?
- A form of deductive reasoning with two premises leading to a conclusion (Correct answer)
- A mathematical equation
- A reading comprehension technique
- A type of essay
Correct answer: A form of deductive reasoning with two premises leading to a conclusion
Syllogisms use two related premises to derive a logical conclusion.
Question 2: In a number series 2, 6, 18, 54, what comes next?
- 162 (Correct answer)
- 108
- 72
- 216
Correct answer: 162
Each number is multiplied by 3 to get the next: 54 × 3 = 162.
Question 3: If all dogs are animals and some animals are pets, what can be concluded?
- Some dogs may be pets, but this cannot be definitively concluded (Correct answer)
- All dogs are pets
- No dogs are pets
- All pets are dogs
Correct answer: Some dogs may be pets, but this cannot be definitively concluded
The premises do not establish a definitive relationship between dogs and pets specifically.
Question 4: What is an analogy question testing?
- The ability to recognize relationships between pairs of concepts (Correct answer)
- Vocabulary memorization
- Mathematical ability
- Reading speed
Correct answer: The ability to recognize relationships between pairs of concepts
Analogy questions assess whether you can identify and apply relationship patterns between words or concepts.
Question 5: In a sequence A, C, F, J, O, what letter comes next?
- U (Correct answer)
- P
- Q
- T
Correct answer: U
The gaps between letters increase by 1 each time: +2, +3, +4, +5, so +6 from O gives U.
Question 6: What does "if P then Q" mean logically?
- Whenever P is true, Q must also be true; but Q can be true without P (Correct answer)
- P and Q are always both true
- Q causes P
- P and Q are unrelated
Correct answer: Whenever P is true, Q must also be true; but Q can be true without P
This conditional statement means P guarantees Q, but Q does not guarantee P.
IDAT Logical Reasoning 1
What is a syllogism in logical reasoning?