MDCAT Logical Reasoning — Logical Deductions
Logical Deductions is a core Logical Reasoning topic in the PMDC MDCAT syllabus, covering 3 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (3)
- Deriving Structures from Given Information
- Predicting New Relations
- Syllogism
How Logical Deductions is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Logical Deductions accounts for 6 questions. It appears in 4 of them, about 1.5 questions a paper. The heaviest was MDCAT 2025, with 2 questions.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 2 |
| MDCAT 2024 | 1 |
| MDCAT 2023 | 1 |
| MDCAT 2022 | 2 |
Logical Deductions MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Logical Deductions
All daffodils are plants. All plants are living things. Some living things are real. Conclusions: I. All daffodils are living things. II. Some living things are flowers. III. All daffodils are real. Which conclusions follow?
- A.Only I
- B.Only I and II
- C.Only II and III
- D.All follow
Show answer
Answer: A. Only I — Only conclusion I ("All daffodils are living things") necessarily follows.
- Q2 · MDCAT 2024 · Logical Deductions
Read the following and choose the correct answer: "X, Y and Z are three whole numbers less than 24 but greater than 11. X is the smallest prime number. Y is the largest number divisible by 3. Z is the smallest number divisible by 11?"
- A.X is 13, Y is 24, Z is 11
- B.X is 13, Y is 21, Z is 22
- C.X is 11, Y is 21, Z is 11
- D.X is 11, Y is 24, Z is 22
Show answer
Answer: B. X is 13, Y is 21, Z is 22 — X=13 (smallest prime >11), Y=21 (largest multiple of 3 under 24), Z=22 (smallest multiple of 11 over 11).
- Q3 · MDCAT 2023 · Logical Deductions
Read the following and choose the correct answer: "X, Y and Z are three whole numbers less than 31 but greater than 23. X is a prime number. Y is the largest odd number smaller than 35. Z is the smallest even number."
- A.X is 31, Y is 29 and Z is 24.
- B.X is 29, Y is 29 and Z is 24.
- C.X is 23, Y is 29 and Z is 24.
- D.X is 27, Y is 31 and Z is 26.
Show answer
Answer: B. X is 29, Y is 29 and Z is 24. — X=29 (prime, 24<X<31), Y=29 (largest odd number under 35), and Z=24 (smallest even number in the 24-30 range) — matching option B.