Six friends, P, Q, R, S, T and U are sitting in a row, all facing towards South. S is not at the end. R is sitting between P and T. Q is sitting to the immediate right of T. U is not at the left end.
Which of the following must be true?
(A) P is sitting at the left end.
(B) U is sitting adjacent to T.
(C) R is sitting third to left of S.
(D) U and S are not neighbors.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A) and (C) only
All six face the same way (South), so “left” and “right” are the same for every person, and the seats can be numbered 1 to 6 from their left.
R is between P and T, and Q is on the immediate right of T:
If T were on R’s left, Q would need R’s seat
So P, R, T, Q sit side by side in that order
This block takes seats 1-4, 2-5 or 3-6, and S and U take the two seats left over.
Seats 2-5: the free seats are 1 and 6, both ends, but S is not at an end. Not possible.
Seats 3-6: S must take seat 2, leaving seat 1, the left end, to U, but U is not at the left end. Not possible.
Seats 1-4: S takes seat 5 and U seat 6. This is the only arrangement.
(A) P is sitting at the left end. Correct. P is in seat 1, the left end of the row.
(B) U is sitting adjacent to T. Incorrect. T is in seat 3 and U in seat 6, with Q and S between them.
(C) R is sitting third to left of S. Correct. R is in seat 2 and S in seat 5, three seats to the left of S.
(D) U and S are not neighbors. Incorrect. S is in seat 5 and U in seat 6, so they are neighbours.