Discussion
Who is to the immediate right of R?
Answer: B
Correct answer: T
Facing the centre, each person’s left is the next seat clockwise and their right the next seat anticlockwise. Fix P; V sits two to P’s left and W two beyond V. Of the two ways to place Q with T three seats to Q’s right, only one keeps T off V’s shoulder, and R and S then fit in one way only. Clockwise the circle reads P → Q → V → S → W → T → R.
R’s right is the next seat anticlockwise, which belongs to T. The arrangement is fully determined, so the data are not inadequate.
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