50 exam-style questions on Logical reasoning · Deduction, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.
Ten Logical reasoning · Deduction questions with answers
Try each one, then open the answer. These ten stay the same; the test draws new ones every time.
1. In a row of students, Ayesha is 9th from the left and 14th from the right. How many students are in the row?
A
23
B
21
C
22
D
24
Show answer
Answer: C. Total = 9 + 14 − 1 = 22, because Ayesha is counted in both positions. Adding to get 23 counts her twice.
2. If 3 March was a Monday, what day of the week was 27 March in the same year?
A
Monday
B
Wednesday
C
Thursday
D
Friday
Show answer
Answer: C. 27 − 3 = 24 days later; 24 = 3 weeks + 3 days, so it is 3 days after Monday, which is Thursday.
3. Ali, Bano, Chand, Dua and Ehsan sit in a row facing south. Chand is at the extreme left end of the row. Dua sits immediately next to Chand. Ali sits immediately to the right of Bano. Ehsan is not at either end. Who is at the extreme right end?
A
Chand
B
Bano
C
Ehsan
D
Ali
Show answer
Answer: D. Facing south, everyone's right is the viewer's left. Chand is at their left end with Dua beside him; Ehsan cannot be at the far end, so he is in the middle, and Ali (to Bano's right) is at the right end. Chand is the slip of switching to the viewer's left and right only for the final question.
4. The clinic is closed on Fridays unless there is an emergency. Today is Friday and the clinic is open. Which conclusion must follow?
A
There is never an emergency on a Friday.
B
The clinic is closed today.
C
The clinic is open every Friday.
D
There is an emergency today.
Show answer
Answer: D. "Closed on Friday unless an emergency" means on a Friday with no emergency it is closed. It is open on a Friday, so there must be an emergency.
5. No student who missed the lab session got full marks. Some students who got full marks are in Section C. Which conclusion must follow?
A
No student in Section C missed the lab session.
B
Some students who missed the lab session are in Section C.
C
Some students in Section C did not miss the lab session.
D
Every student who attended the lab session got full marks.
Show answer
Answer: C. The Section C students with full marks cannot have missed the lab. Other Section C students might have missed it.
6. Some students are athletes. All athletes are early risers. Which conclusion must follow?
A
No students are early risers.
B
Some students are early risers.
C
All students are early risers.
D
All early risers are athletes.
Show answer
Answer: B. The students who are athletes are early risers, so some students are early risers. Nothing is said about other students or other early risers.
7. All nurses on the ward wear blue uniforms. Sana is on the ward and does not wear a blue uniform. Which conclusion must follow?
A
Sana is not a nurse on the ward.
B
Sana is a doctor.
C
Everyone on the ward in a blue uniform is a nurse.
D
Some nurses on the ward do not wear blue uniforms.
Show answer
Answer: A. If Sana were a nurse on the ward she would wear blue, so she is not one. What else she is cannot be known.
8. All members of the debate club are good speakers. Some students in Class 12 are not good speakers. Which conclusion must follow?
A
All students in Class 12 are good speakers.
B
All good speakers are in Class 12.
C
No students in Class 12 are members of the debate club.
D
Some students in Class 12 are not members of the debate club.
Show answer
Answer: D. Those Class 12 students who are not good speakers cannot be members. Other Class 12 students might still be members, so "no students" goes too far.
9. In a code, "P + Q" means P is the father of Q, "P − Q" means P is the sister of Q, and "P × Q" means P is the mother of Q. If A × B + C, how is A related to C?
A
Paternal grandmother
B
Maternal grandmother
C
Mother
D
Aunt
Show answer
Answer: A. A is the mother of B, and B is the father of C. So A is the mother of C's father: C's paternal grandmother. "Maternal" would need B to be C's mother.
10. Six friends P, Q, R, S, T and U sit around a round table, all facing the centre. P is opposite S. Q is immediately to the right of P. T is opposite Q. R does not sit next to P. Who sits immediately to the left of P?
A
Q
B
R
C
T
D
U
Show answer
Answer: D. Q takes the seat on P's right, and T sits opposite Q. Of the two seats left, the one next to P cannot be R, so U is on P's immediate left. Q is the trap for anyone who mixes up left and right.
Chapter test. Ten questions from Logical reasoning · Deduction, drawn fresh each time, about ten minutes.
Practice mode. The right answer and the explanation after every question, with no clock. Exam mode keeps the marks until the end and runs a timer.
Hints. One tap for a nudge, a second to remove two wrong options.
My mistakes. Every question you get wrong is kept, and leaves the list once you get it right.
Logical reasoning · Deduction: questions students ask
How many Logical reasoning · Deduction MCQs are there?
50, each with the answer and a short explanation, across 2 topics: Logical deductions, Logical problems. Every chapter test draws ten of them, so you can take it many times.
Is the MDCAT Logical Reasoning chapter 3 test free?
Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.
How is the chapter test marked?
The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.
