Seven boxes A, B, E, F, G, N and O are kept one over the other but not necessarily in the same order. Only three boxes are kept above E. Only one box is kept between O and E. Only three boxes are kept between O and N. N is kept at some place above E. A is kept immediately below N. B is kept at one of the places above F. G is not kept immediately above or below O. Which box is kept at the lowermost position?

Appeared in: RRB Nsg Superintendent -29 April 2025 (Shift-1st)

Explanation

Based on the step-by-step deduction from the given conditions, the final arrangement places box F at the bottom-most position (position 7).
The initial clue about box E having three boxes above it fixes its position to the 4th spot, providing a crucial anchor point for the solution.
Eliminating the incorrect possibility for O's position (position 2) is key. Placing O at position 6 is the only way to satisfy the conditions for N's placement.
The final clue about B being above F resolves the placement of the last two boxes, confirming F is at the very bottom.

Option A: Box A is placed at position 3. The clue 'A is kept immediately below N' places it in the upper half of the stack, not at the bottom.
Option B: Box O is placed at position 6. It is near the bottom but is not the lowermost box.
Option D: Box E is placed at position 4. The clue 'Only three boxes are kept above E' explicitly places it in the middle of the stack.

Visual 1: Diagram - A final diagram showing the vertical stack of the seven boxes from top to bottom: G, N, A, E, B, O, F.
Visual 2: Flowchart - A step-by-step flowchart showing how each clue is used to place the boxes one by one, leading to the final arrangement.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Seating/Placement Arrangement as background academic context rather than a clinical decision trigger.
This is a logical reasoning question designed to test problem-solving and deductive skills, not clinical knowledge.
The ability to follow a sequence of logical steps is a foundational skill for nurses when using protocols, interpreting physician's orders, and performing multi-step procedures.
What if the question asked which box is at the top? Following the same logical deduction, the answer would be G.

How to Approach the Question

First, identify the total number of items (7 boxes) and create a corresponding number of empty slots (1 to 7) to represent the stack.
Scan the clues for a definite statement that fixes an item's position. 'Only three boxes are kept above E' is the best starting point, as it definitively places E at position 4.
Use a visual aid like a numbered list to fill in the positions as you deduce them. This helps in tracking progress and spotting contradictions.
Proceed by applying each clue sequentially. When a clue presents multiple possibilities (like O's position relative to E), test each case against the other rules to eliminate the incorrect path.
After placing all the boxes, perform a final check by reading through all the original clues to ensure your final arrangement doesn't violate any of them.
Finally, re-read the question ('Which box is kept at the lowermost position?') to ensure you are answering what is being asked.

Concept Tested & Keywords

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Practise the full RRB Nsg Superintendent -29 April 2025 (Shift-1st)

Attempt every question from this paper in a timed mock, then review the full solution for each one.