In this question, two statements numbered (I) and (II) are given after a question. Decide whether the information given in the statements is sufficient to answer the question. Read both statements and select the appropriate answer. Among five trees N, O, R, S, and T, each has a different height. Which of these is the tallest tree? (I) O is shorter than only one tree. O is taller than N but shorter than R. (II) N is taller than T.

Appeared in: RRB Nsg. Superintendent-2026 (Shift -3rd)

Explanation

The core task is to determine if a single, definitive answer can be found using the information provided in the statements.
Statement I is sufficient because it allows for a concrete deduction. The phrase 'shorter than only one tree' fixes O's rank as second tallest.
Coupled with the fact that 'R is taller than O', the only logical conclusion is that R must be the tallest tree.
Statement II is insufficient as it only provides a relationship between two of the five trees (N > T), leaving the position of the other three unknown and making it impossible to identify the tallest overall.

Option B: This option claims that even with both statements, the question cannot be answered. This is false because Statement I by itself is sufficient.
Option C: This option incorrectly claims that Statement II alone is sufficient. Statement II only compares N and T, which is not enough to determine the tallest of the five trees.
Option D: This option suggests that both statements are needed together. In data sufficiency, if one statement is sufficient on its own, you do not need to combine it with the other.

Visual 1: Flowchart: A flowchart illustrating the logical deduction process. Start with '5 Trees'. A branch for 'Statement I' leads to 'O is 2nd Tallest' and 'R > O', which combine to 'R is Tallest'. A separate branch for 'Statement II' shows 'N > T' leading to 'Insufficient Information'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Data Sufficiency in Logical Reasoning as background academic context rather than a clinical decision trigger.
While this is a logic puzzle, the underlying skill of assessing data sufficiency is critical in nursing. A nurse must constantly evaluate if they have enough information to make a safe clinical decision.
For example, before administering a medication, a nurse must determine if the patient's current vital signs, lab results, and reported symptoms are sufficient to proceed, or if more data is needed from the doctor.
What if? If Statement I had said 'O is taller than N, R, and S', it would also be sufficient, as it would leave T as the only possibility for the tallest or shortest, and further analysis could pinpoint the tallest.

How to Approach the Question

First, clearly identify the question being asked: 'Which tree is the tallest?'.
Analyze Statement (I) by itself. Break down each piece of information ('O is shorter than only one tree' and 'O is taller than N but shorter than R') and see if they combine to give a single, definitive answer.
If Statement (I) is sufficient, your answer will be either 'Statement I alone is sufficient' or 'Each statement alone is sufficient'.
Next, analyze Statement (II) by itself, completely ignoring the information from Statement (I). Determine if 'N is taller than T' is enough to answer the main question.
Compare your findings. In this case, Statement (I) is sufficient, but Statement (II) is not. This directly leads to the correct option.
If neither statement alone were sufficient, the final step would be to combine the information from both and check for sufficiency.

Concept Tested & Keywords

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Practise the full RRB Nsg. Superintendent-2026 (Shift -3rd)

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