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

A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order). Further 1. Lecturer from Kanpur is specialized in Geography 2. Lecturer D is from Shillong 3. Lecturer C from Delhi is specialized in Sociology 4. Lecturer B is specialized in neither History nor Mathematics 5. Lecturer A who is specialized in Economics does not belong to Hyderabad 6. Lecturer F who is specialized in Commerce belongs to Srinagar 7. Lecturer G who is specialized in Statistics belongs to Chennai Who of the following belongs to Hyderabad?

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Last updated 8 Jul 2026, 4:39 pm IST
  1. AB
  2. BECorrect
  3. CNEITHER B NOR E
  4. DCannot be determined as data are inadequate

Explanation

Here's a step-by-step breakdown:

  1. Identify direct assignments:

    • C is from Delhi and specialized in Sociology.
    • F is from Srinagar and specialized in Commerce.
    • G is from Chennai and specialized in Statistics.
    • D is from Shillong. (Subject unknown)
    • A is specialized in Economics but not from Hyderabad.
  2. Use Clue 1 (Kanpur, Geography): A lecturer from Kanpur is specialized in Geography. This means the person from Kanpur is the Geography specialist.

  3. Determine A's city:

    • A is specialized in Economics.
    • A is not from Hyderabad (given).
    • A cannot be from Kanpur because Kanpur is for Geography (Clue 1).
    • The cities already assigned are Delhi, Srinagar, Chennai, Shillong. The remaining cities are Hyderabad, Kanpur, Mumbai.
    • Since A is not Hyderabad and not Kanpur, A must be from Mumbai.
    • So, A is from Mumbai and specialized in Economics.
  4. Identify remaining Lecturers, Cities, and Subjects:

    • Lecturers remaining: B, E
    • Cities remaining: Hyderabad, Kanpur
    • Subjects remaining (for B, E, and D): History, Geography, Mathematics (Economics, Commerce, Sociology, Statistics are taken).
  5. Apply Clue 4 (B's subjects): Lecturer B is specialized in neither History nor Mathematics.

    • From the remaining subjects (History, Geography, Mathematics), if B is neither History nor Mathematics, then B must be specialized in Geography.
  6. Determine B's city:

    • If B is specialized in Geography, then according to Clue 1 (Lecturer from Kanpur is specialized in Geography), B must be from Kanpur.
    • So, B is from Kanpur and specialized in Geography.
  7. Determine E's city:

    • All lecturers except E have been assigned a city (A-Mumbai, B-Kanpur, C-Delhi, D-Shillong, F-Srinagar, G-Chennai).
    • The only remaining city is Hyderabad.
    • Therefore, E must be from Hyderabad.

The final answer is B) E.

Logical Reasoning: A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srina

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