P, Q, R, S, T and U are sitting in a row facing North. R is sitting between P…
2022
P, Q, R, S, T and U are sitting in a row facing North. R is sitting between P and T. S is not at the end. Q is sitting immediate right to T. U is not at the right end. Then who is immediate left of R?
- A.
P
- B.
Q
- C.
S
- D.
T
Attempted by 120 students.
Show answer & explanation
Correct answer: A
Solution: Determine seating positions facing North and identify who is immediate left of R.
R sits between P and T, so the three must be consecutive in the order P R T or T R P.
Q is immediately to the right of T, so Q must be the neighbor on T's right.
S is not at an end (not first or last) and U is not at the right end (not last).
Place the block P R T with Q immediately right of T. To satisfy all constraints, place them at positions 3–6 (left to right): P, R, T, Q. The remaining positions 1–2 become U and S with S not at an end, giving the full arrangement: U, S, P, R, T, Q.
Final left-to-right seating (facing North): U, S, P, R, T, Q.
Therefore the person immediately to the left of R is P.