Question 86

Logical Reasoning Puzzles Hard

Three are six teacher A, B, C, D , E and F in a school, Each teacher has to teach two subjects, one compulsory and the other optional. D’s optional is History, while three others have it as a compulsory subject, E and F have Physics as one of their subjects, F‘s compulsory subject in Mathematics, which is an optional subject of both C and E, History and English are A’s subject but in term of compulsory and optional subjects, they are reserved of D’s Chemistry is an optional subject of one of the teachers. There is only one female teacher, who has English as her compulsory subject. <br /> Disregrading which is compulsory or optional subject , who has the same two subject combination as that of F ?

(A) B
(B) E
(C) D
(D) A
View Dynamic Solution & Explanation
Correct Solution: Option B

Step-by-step Solution:

Quick Solution

This is a matrix puzzle. The best way to solve it is to create a table for the six teachers and their compulsory/optional subjects, then fill it in using the clues one by one.



1. Step-by-Step Deductions from the Clues

  1. Clue: "F's compulsory subject in Mathematics, which is an optional subject of both C and E" This directly gives us: F (Compulsory: Math), C (Optional: Math), E (Optional: Math).
  2. Clue: "E and F have Physics as one of their subjects" From the previous step, we can complete the subjects for E and F. Since F's compulsory subject is Math, his optional must be Physics. Since E's optional subject is Math, his compulsory must be Physics.
    • F's subjects are (Mathematics, Physics).
    • E's subjects are (Physics, Mathematics).
  3. Clue: "D's optional is History..." and "History and English are A's subject but...they are reserved [reversed] of D's" This means if D's optional is History, A's compulsory must be History. And if A's other subject is English (making it optional), then D's compulsory must be English.
    • A's subjects are (History, English).
    • D's subjects are (English, History).
  4. Clue: "Chemistry is an optional subject..." Looking at the progress, the only teacher with a free optional slot is B. So, B's optional subject is Chemistry.
  5. Clue: "...three others have [History] as a compulsory subject" We already know A has compulsory History. The only teachers with empty compulsory slots are B and C. Therefore, B and C must have History as their compulsory subject.


2. The Final Table

TeacherCompulsory SubjectOptional Subject
AHistoryEnglish
BHistoryChemistry
CHistoryMathematics
DEnglishHistory
EPhysicsMathematics
FMathematicsPhysics

3. Answering the Question

The question asks who has the same two subjects as F, ignoring the compulsory/optional distinction.

  • F's subjects are Mathematics and Physics.
  • Looking at the table, E's subjects are also Physics and Mathematics.

Final Answer: E has the same two subject combination as F.