Discussion
Five friends A, B, C, D and E are sitting on a bench.
I. A is sitting next to B.
II. C is sitting next to D.
III. D is not sitting with E.
IV. E is on the left end of the bench.
V. C is on second position from the right.
VI. A is on the right side of B and E.
VII. A and C are sitting together.
What is the position of B ?
Answer: D
B is second from left.
Number the seats 1 to 5 from the left. E is at the left end, seat 1 (IV), and C is second from the right, seat 4 (V). D sits next to C but not next to E, so D is in seat 3 or 5, and A sits next to C (VII), so A is in the other of seats 3 and 5.
A must also sit next to B and to the right of B (I, VI). If A were in seat 5, B would have to be in seat 4, which C holds, so A is in seat 3, D in seat 5, and B in seat 2.
The arrangement is E, B, A, C, D, so B is second from the left. The extreme left is E, the extreme right is D, and second from the right is C.
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