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Six friends P, Q, R, S, T, and U are sitting in a straight line facing North. S is sitting second to the right of Q. R is sitting between P and S. T is sitting to the immediate left of U. If Q is at one of the ends, who is sitting to the immediate right of S?
P
R
T
U
T
Place the fixed end element first and anchor all relative positions (S is second to right of Q) to deduce the remaining chain sequence.
Place the fixed end element first and anchor all relative positions (S is second to right of Q) to deduce the remaining chain sequence.
Establish the base position
Since Q is at an end and S is second to the right of Q, Q must be at the far left end. The arrangement starts: Q, _, S.
Place R and P
R is between P and S, meaning the sequence is P, R, S. Combining this with the first step, we get: Q, P, R, S.
Place the remaining pair
Two positions remain. We are told T is to the immediate left of U. This fits only in the last two spots as T, U. The full line is: Q, P, R, S, T, U.
Identify the immediate right of S
Looking at the finalized line Q-P-R-S-T-U, the person sitting immediately to the right of S is T.
A: P is sitting to the immediate left of R, not to the right of S. B: R is sitting to the immediate left of S. D: U is sitting at the extreme right end, two places away from S.
C is correct because the final arrangement is Q-P-R-S-T-U, placing T immediately to the right of S.
In linear seating puzzles, always define the direction (North = Right/Left matches your own) and prioritize filling constrained positions before filling empty gaps.