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Seven people, A, B, C, D, E, F, and G, are sitting in a row, facing the north. Only two people sit to the right of B. F sits to the immediate left of D. Only two people sit between B and D. C sits to the immediate right of A. G sits to the immediate left of E. E sits at one of the extreme ends of the row. Who is sitting third from the left end of the row?
C
F
D
A Question ID : 4410091603286 Option 1 ID : 4410096332342 Option 2 ID : 4410096332340 Option 3 ID : 4410096332341 Option 4 ID : 4410096332343 Status : Answered Chosen Option : D
A Question ID : 4410091603286 Option 1 ID : 4410096332342 Option 2 ID : 4410096332340 Option 3 ID : 4410096332341 Option 4 ID : 4410096332343 Status : Answered Chosen Option : D
Fix the anchor position of B and use the relative constraints of F-D and E-G to fill the row from the ends towards the center.
Fix the anchor position of B and use the relative constraints of F-D and E-G to fill the row from the ends towards the center.
Establish the row and anchor B
There are 7 seats. Since only 2 people sit to the right of B, B must be in position 5 (from left). Seats: _ _ _ _ B _ _
Place D and F
Only 2 people sit between B and D. Since B is at 5, D can be at 2 or 8. Since there are only 7 seats, D must be at seat 2. F sits to the immediate left of D, so F is at seat 1. Seats: FD _ _ B _ _
Place E, G, A and C
E sits at an extreme end. F is at 1, so E must be at 7. G sits to the immediate left of E, so G is at 6. The remaining seats are 3 and 4. A and C must occupy these, with C to the immediate right of A. Thus, A is at 3 and C is at 4. Row: F D A C B G E
A: C is 4th from the left, not 3rd. B: F is 1st from the left, not 3rd. C: D is 2nd from the left, not 3rd.
D is correct because based on the arrangement F-D-A-C-B-G-E, A is clearly in the third position from the left.
In row seating puzzles, always place the anchor (the person with a fixed position relative to an end) first, then connect linked segments to minimize trial-and-error.
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