P, Q, R, S, T, U and V each have their exam on different days of the same week starting on Monday and ending on Sunday. Only three people have their exam after U. Only four people have their exam after V. Q has his exam after P but before V. S has his exam before R but it is not on Friday. How many people have their exam between Q and P?

1. A

   Zero

2. B

   Three

3. C

   One

4. D

   Six

Appeared in: DSSSB 12 August 2024

Explanation

• The problem requires creating a 7-day schedule (Monday-Sunday) for 7 people based on logical clues.
• The clue 'Only three people have their exam after U' places U on Thursday.
• The clue 'Only four people have their exam after V' places V on Wednesday.
• The sequence 'Q has his exam after P but before V' means P must be on Monday and Q on Tuesday.
• Since P is on Monday and Q is on Tuesday, they are on consecutive days, meaning zero people have an exam between them.

Why Other Options Were Wrong

• Option B: This is an incorrect count. Three is the number of people (T, S, R) who have their exam after U.
• Option C: This is an incorrect count. One is the number of people (Q) between P and V.
• Option D: This is an incorrect count. Six is the total number of people who have their exam after P.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical reasoning and sequential arrangement based on fixed and relative constraints as background academic context rather than a clinical decision trigger.
• While this is a non-nursing question, the underlying skill of logical reasoning is essential in nursing.
• Nurses use sequencing and deductive logic to prioritize patient care (e.g., which patient to see first), organize complex medication schedules, and perform systematic assessments to rule out differential diagnoses.
• What if? - If the clue had been 'Q has his exam two days after P', then P would be on Monday and Q on Wednesday, placing V on a later day and changing the entire schedule. This highlights how a single change in timing affects the whole plan of care.

How to Approach the Question

• First, create a framework for the week with seven slots, from Monday to Sunday.
• Identify the 'anchor' clues. These are absolute statements that fix a person to a specific day. Here, the clues about U and V are anchors.
• Place the anchors (U on Thursday, V on Wednesday) into your framework.
• Next, use the 'relative' clues, which describe the position of people in relation to each other (e.g., P → Q → V).
• Fit the relative sequences into the remaining empty slots. The P → Q → V sequence must fit before Wednesday, placing P on Monday and Q on Tuesday.
• Use the process of elimination to place the remaining people (S, R, T) based on the final clues.

Concept Tested & Keywords

• Concept Tested: Logical reasoning and sequential arrangement based on fixed and relative constraints.
• Stem keywords: P, Q, R, S, T, U, V, exam, week, Monday, Sunday, after, before, between
• Lead-in keywords: How many

Question ID

QbH82flZLQk95Gf3EAuryA

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