Question 14
MediumOriginal questionSeven people, A, B, C, D, E, F and G, sit on a long bench in a row, all facing north.
1. D sits exactly in the middle of the row.
2. Only one person sits between B and D.
3. G sits immediately to the right of B.
4. A sits at one of the ends, and exactly three people sit between A and G.
5. F does not sit next to D.
6. C sits immediately to the left of A.
Which of A to G has the seat at the left end of the bench?
Show the answer and explanation
Correct answer: A
Explanation
D is fourth of seven. One person between B and D puts B second or sixth, with G immediately to B's right: B-G in seats 2-3 or 6-7.
A is at an end with three people between A and G. If G were seventh, A would have to be third, not an end. So B is second, G third and A seventh.
C is immediately left of A: sixth. F cannot be next to D, so F takes the first seat and E the fifth.
Bench, left to right: F, B, G, D, E, C, A.
The left end is F.
Worth noting
A is at the other end. Clue 4 says only 'one of the ends'; the case test decides which.
- Concept
- Case split on which end a person takes
- Typical timeTypical
- 80 s
- Your timeYours
- —
Ten questions from Seating Arrangement, at your own pace.