Discussion
How many persons are sitting between Q and S?
Answer: D
Correct answer: two or three
Facing the centre, each person’s left is the next seat clockwise and their right the next seat anticlockwise. Fix S; P sits two to S’s left, M three beyond P and T three to S’s left. Of the three seats left, Q must take the one that does not touch S and N the one that does not touch M, leaving R the last. Clockwise the circle reads S → N → P → T → Q → M → R.
Q and S are not opposite, so the two arcs between them are of different lengths: going one way past M and R gives two people, going the other past T, P and N gives three. Since the question does not say which way round to count, both answers stand.
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