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Seven boxes A, B, C, D, E, F and G are kept one over the other but not necessarily in the same order. Only two boxes are kept below D. Only three boxes are kept between E and
C
G
E
C is kept above A but below G. B is kept above F but below A. Which box is kept immediately above A? D
C
Represent positions 1 to 7 from top to bottom and fix anchors (D at 5) to quickly deduce the vertical sequence.
Represent positions 1 to 7 from top to bottom and fix anchors (D at 5) to quickly deduce the vertical sequence.
Establish vertical framework
There are 7 boxes. Position 1 is top, 7 is bottom. D is 2 boxes from bottom, so D is at position 5.
Placement constraints
Constraint 1: 3 boxes between E and D. If D is 5, E must be at 1 (5-4=1) or 9 (impossible). So E is at 1.
Sequence deduction
Given G > C > A > B > F. With E at 1 and D at 5, we place G, C, A, B, F in the remaining slots 2, 3, 4, 6, 7. This fills the order: 1:E, 2:G, 3:C, 4:A, 5:D, 6:B, 7:F.
Final identification
Looking at the stack, A is at position 4. The box immediately above A (position 3) is C.
B: G is at position 2, which is above C, not immediately above A. C: E is at position 1, which is not above A. D: D is at position 5, which is below A, not above.
A is correct because the sequence from top to bottom is E, G, C, A, D, B, F, making C the box immediately above A.
In vertical arrangement puzzles, always identify the 'fixed' anchor point (like D) first to split the problem into manageable top and bottom sections.