Seven boxes- A, B, C, D, E, F and G are kept in a stack one above the other but not necessarily in the same order. The bottommost position is 1 above that 2 and so on.
At most two boxes are kept above box D.
Box E is kept immediately above box D.
| | Case 1 | Case 2 |
| Position | Box | Box |
| 7 | E | |
| 6 | D | E |
| 5 | | D |
| 4 | | |
| 3 | | |
| 2 | | |
| 1 | | |
As many boxes are kept above box E as below box C.
| | Case 1 | Case 2 |
| Position | Box | Box |
| 7 | E | |
| 6 | D | E |
| 5 | | D |
| 4 | | |
| 3 | | |
| 2 | | C |
| 1 | C | |
Two boxes are kept between box C and box G.
Thus, Case 2 gets cancelled.
| | Case 1 |
| Position | Box |
| 7 | E |
| 6 | D |
| 5 | |
| 4 | G |
| 3 | |
| 2 | |
| 1 | C |
Only one box is kept between box G and box F.
Box A is kept below box B.
| Position | Box |
| 7 | E |
| 6 | D |
| 5 | B |
| 4 | G |
| 3 | A |
| 2 | F |
| 1 | C |
This is the final arrangement.
Two boxes are kept above box B.
Study Notes
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