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ABHYAS PREP: REASONING CORE · SEATING ARRANGEMENT

Linear seating arrangement (one row, facing north)

Draw the row as blanks, place the most fixed clue first (ends, “third from the left”), then the neighbour and gap clues, and keep every possibility until a clue removes it.

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Worked examples

Example 1 · level 1

5 friends Tenzin, Harpreet, Isha, Priya and Fatima sit in a row, all facing north. • Harpreet sits immediately to the right of Fatima. • Exactly 2 people sit between Harpreet and Tenzin. • Tenzin sits first from the left end. • Fatima sits immediately to the right of Priya. Who sits at the right end of the row?

  1. Tenzin
  2. Isha
  3. Harpreet
  4. Fatima
Show solution
  1. Placing the clues one by one leaves exactly one arrangement (left to right): Tenzin – Priya – Fatima – Harpreet – Isha.
  2. Who sits at the right end of the row? → Isha.

Answer: Isha

Example 2 · level 2

6 friends Tenzin, Arjun, Isha, Diya, Lakshmi and Joseph sit in a row, all facing north. • Exactly one person sits between Arjun and Isha. • Joseph sits first from the left end. • Arjun does not sit at either end. • Exactly one person sits between Joseph and Lakshmi. • Arjun sits somewhere to the left of Tenzin. • Diya sits immediately to the right of Tenzin. • Exactly 2 people sit between Arjun and Tenzin. How many people sit between Joseph and Isha?

  1. 1
  2. 2
  3. 3
  4. 4
Show solution
  1. Placing the clues one by one leaves exactly one arrangement (left to right): Joseph – Arjun – Lakshmi – Isha – Tenzin – Diya.
  2. How many people sit between Joseph and Isha? → 2.

Answer: 2

Example 3 · level 3

7 friends Aditya, Ayaan, Harpreet, Tenzin, Diya, Kabir and Ananya sit in a row, all facing north. • Aditya is not an immediate neighbour of Tenzin. • Tenzin sits at one of the ends. • Exactly one person sits between Ayaan and Kabir. • Aditya is not an immediate neighbour of Ayaan. • Diya does not sit at either end. • Exactly one person sits between Ananya and Diya. • Ananya is not an immediate neighbour of Kabir. • Exactly 2 people sit between Aditya and Diya. • Aditya sits third from the left end. How many people sit between Tenzin and Aditya?

  1. 0
  2. 1
  3. 2
  4. 3
Show solution
  1. Placing the clues one by one leaves exactly one arrangement (left to right): Tenzin – Harpreet – Aditya – Ananya – Ayaan – Diya – Kabir.
  2. How many people sit between Tenzin and Aditya? → 1.

Answer: 1

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