Discussion
Four of the following five are alike in a certain way, based on the information given above and so form a group. Which is the one that does not belong to that group?
Answer: C
Correct answer: GC
Four face outward and four face the centre, so “left” and “right” must be read from each person’s own seat: facing the centre, the left is clockwise; facing outward, the left is anticlockwise.
E faces outward, so H two seats to E’s right and B three to E’s left are placed at once - and B can only be three seats to H’s right if H too faces outward. D faces the centre with both neighbours facing outward, which rules out every seat but one, and F must then sit beside D. Of the seats left, C and G must be neighbours, which forces A into the seat beside E, with G two to A’s left and C beyond.
Clockwise the circle reads E → A → H → G → C → B → F → D, with E, H and F facing outward and A and D facing the centre.
In HA, FH, DA and AE at least one of the two named sits immediately beside E or beside D - the two friends whose own facing the clues fix, and around whom the whole arrangement is built. Neither G nor C does: they sit together in the opposite arc, next to H and B. So GC is the pair that does not belong.
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