The puzzle
Chetan, Farhan, Esha, Harsh sit in a single row, all facing north. Seat 1 is the far-left end and seat 4 is the far-right end. Using the clues below, work out the order from left to right.
- Exactly 2 people sit between Chetan and Esha.
- Farhan sits immediately to the left of Esha.
- Exactly 1 person sits between Esha and Harsh.
Question: What is the seating order from far-left to far-right?
Reveal the answer
Answer: Chetan, Harsh, Farhan, Esha (left to right).
Seat 1ChetanSeat 2HarshSeat 3FarhanSeat 4Esha
- Start: 24 possible left-to-right orders of 4 people.
- Clue 1 — "Exactly 2 people sit between Chetan and Esha." leaves 4 possibilities.
- Clue 2 — "Farhan sits immediately to the left of Esha." leaves 1 possibility.
- Clue 3 — "Exactly 1 person sits between Esha and Harsh." leaves 1 possibility.
- Exactly one order survives every clue — that is the answer.