Five books A, B, C, D and E are kept one above the other in such a way that…
2013
Five books A, B, C, D and E are kept one above the other in such a way that 'E' is above 'A', 'C' is below 'D', 'A' is above 'D' and 'B' is below 'C'. Which book is kept at the lowermost position?
- A.
C
- B.
D
- C.
B
- D.
A
Attempted by 9 students.
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Correct answer: C
Translate each clue into an 'above/below' relation (top of the stack is higher).
E is above A -> E > A. A is above D -> A > D. C is below D -> D > C. B is below C -> C > B.
Linking these gives the single ordering from top to bottom: E, A, D, C, B.
Hence the book at the lowermost position is B.