UPSC Prelims 2017·CSAT·Logical Reasoning·Arrangement and Puzzles

In a school, there are five teachers A, B, C, D and E. A and B teach Hindi and English. C and B teach English and Geography. D and A teach Mathematics and Hindi. E and B teach History and French. Who teaches maximum numb, of subjects?

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Last updated 8 Jul 2026, 4:39 pm IST
  1. AA
  2. BBCorrect
  3. CD
  4. DE

Explanation

Step-by-step analysis:

  1. A and B teach Hindi and English.

    • A: {Hindi, English}
    • B: {Hindi, English}

  2. C and B teach English and Geography.

    • C: {English, Geography}
    • B: {Hindi, English, Geography} (English is already counted for B)

  3. D and A teach Mathematics and Hindi.

    • D: {Mathematics, Hindi}
    • A: {Hindi, English, Mathematics} (Hindi is already counted for A)

  4. E and B teach History and French.

    • E: {History, French}
    • B: {Hindi, English, Geography, History, French}

Counting unique subjects for each teacher:

  • A teaches: Hindi, English, Mathematics (3 subjects)
  • B teaches: Hindi, English, Geography, History, French (5 subjects)
  • C teaches: English, Geography (2 subjects)
  • D teaches: Mathematics, Hindi (2 subjects)
  • E teaches: History, French (2 subjects)

Comparing the counts, B teaches the maximum number of subjects (5).

The final answer is B.

Logical Reasoning: In a school, there are five teachers A, B, C, D and E. A and B teach Hindi and English. C and B teach English and Geogra
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