In a certain code language: A + B means 'A is the sister of B'. A - B means 'A is the brother of B'. A x B means 'A is the wife of B'. And A ÷ B means 'A is the father of B'. If 'L - M x N ÷ O + P', then how is L related to P?

1. A

   Maternal Uncle

2. B

   Paternal Uncle

3. C

   Maternal Grandfather

4. D

   Grandfather

Appeared in: DSSSB 6 September 2024

Explanation

• The expression 'L - M' establishes that L is the brother of M.
• The expression 'M x N' means M is the wife of N, making them a married couple.
• The expression 'N ÷ O' means N is the father of O.
• The expression 'O + P' means O is the sister of P, so O and P are siblings.
• Combining these facts, M is the mother of P (as she is the wife of P's father, N).
• Since L is the brother of M (P's mother), L is P's maternal uncle.

Why Other Options Were Wrong

• Option B: A paternal uncle is the father's brother. In this case, L is the mother's (M's) brother, not the father's (N's) brother.
• Option C: A maternal grandfather is the mother's father. The expression does not provide information about M's father; it only identifies her brother (L) and her husband (N).
• Option D: While a maternal uncle is a type of grandfatherly figure, the term 'Grandfather' is too general. The specific relationship is maternal uncle. N is the father of P, not the grandfather.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain This question tests the ability to decipher coded relationships and apply logical deduction to determine family connections, a common type of problem in logical reasoning assessments as background academic context rather than a clinical decision trigger.
• While not a clinical question, logical reasoning is a core competency for nurses. It is essential for interpreting complex patient charts, understanding family health histories, and making sound clinical judgments under pressure.
• This skill helps in prioritizing tasks, troubleshooting equipment, and applying the nursing process (Assessment, Diagnosis, Planning, Implementation, Evaluation) effectively.
• What if? If the expression was 'L + M x N ÷ O - P', how would the relationship change? 'O - P' would mean O is the brother of P. 'L + M' would mean L is the sister of M. In this case, L would be the maternal aunt of P.

How to Approach the Question

• First, create a clear key for each symbol's meaning (e.g., + = sister, - = brother).
• Break down the long expression ('L - M x N ÷ O + P') into pairs of relationships.
• It's often easiest to work from right to left, establishing the youngest generation first. Start with 'O + P' (O is sister of P).
• Build upon each relationship. Next, 'N ÷ O' (N is father of O, and therefore P). Then 'M x N' (M is wife of N, so M is the mother of O and P).
• Finally, add the last piece: 'L - M' (L is the brother of M).
• Trace the complete path from L to P on your mental or drawn family tree to determine the final relationship: L is the brother of P's mother.

Concept Tested & Keywords

• Concept Tested: This question tests the ability to decipher coded relationships and apply logical deduction to determine family connections, a common type of problem in logical reasoning assessments.
• Stem keywords: code language, A + B, A - B, A x B, A ÷ B, L - M x N ÷ O + P
• Lead-in keywords: how is L related to P?

Question ID

Q7WyBJcOq3TZy214q0cV6U

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