Seven people, R, O, A, M, I, N and G, are sitting in a row, facing north. No…
2026
Seven people, R, O, A, M, I, N and G, are sitting in a row, facing north. No one sits to the left of A. Only four people sit between A and I. Only three people sit to the right of R. G sits to the immediate left of N. O is not an immediate neighbor of R. Who sits at the rightmost end of the row?
Answer: C. O — ConceptIn a single-row arrangement, place exact end positions and exact-count clues first. When everyone faces north, left and right are read directly from…
- A.
M
- B.
R
- C.
O
- D.
G
Attempted by 56 students.
Show answer & explanation
Correct answer: C
Concept
In a single-row arrangement, place exact end positions and exact-count clues first. When everyone faces north, left and right are read directly from the viewer’s perspective.
If a stated number of people sit between two persons, their seat numbers differ by one more than that count. Place linked blocks only after fixing the anchored seats.
Application
Number the seats 1 through 7 from left to right.
No one sits to the left of A, so A occupies seat 1.
Four people sit between A and I, so their positions differ by 5. Therefore I occupies seat 6.
Three people sit to the right of R, so R occupies seat 4.
The vacant seats are 2, 3, 5 and 7. The only consecutive vacant pair available for G immediately to the left of N is 2–3; hence G occupies seat 2 and N occupies seat 3.
M and O must occupy seats 5 and 7. Since O is not an immediate neighbor of R in seat 4, O cannot occupy seat 5; therefore O occupies seat 7 and M occupies seat 5.
Cross-check
The completed order is A–G–N–R–M–I–O. It satisfies every given condition: A is leftmost, A and I have four people between them, R has three people to its right, G is immediately left of N, and O is not adjacent to R.
Result
Therefore, O sits at the rightmost end of the row.