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38. P, Q, R, S, T, U, V and W are sitting in a row facing North. P and S are neighbours; Wis a neighbour of both Q and U; T is a neighbour of R and V. If there are four people between P and V, how many people are there between P and R?

38. Eight chairs are placed at a uniform distance from each other around a round table. C and D are equal distance away from both A and B; E sits between A and C; G and F sit opposite each other. Where does H sit?