Blood Relations & Direction Vectors

Family tree mapping, coded relations (A + B means A is father of B), and 2D direction navigation.

Target: EPFO APFC 2026•Topic-Level RAG Context Active•Model: Nemotron 3.5 Lightning 30B / 120B

Topic Overview

Family tree mapping, coded relations (A + B means A is father of B), and 2D direction navigation.

Key Syllabus Concepts

Family Tree Representation Symbols (+ male, - female, = spouse, | parent-child)
Coded Blood Relation expression evaluation
Direction Sense: 8 cardinal directions (N, S, E, W, NE, NW, SE, SW), Pythagoras theorem for shortest distance
Shadow directions (Sunrise shadow falls West, Sunset shadow falls East)

High-Yield Important Points & Rules

💡 Do not assume gender from names; determine strictly from relationship descriptors.
💡 Shortest distance d = √(Δx² + Δy²).

Historical UPSC EPFO PYQ Relevance

3 Matched PYQs

2025•EPFO APFC•General Ability Test• Q.73

Full Question

A train starts from station A at 9 AM and reaches station B at 2 PM. Another train starts from station B at 11 AM and reaches station A at 3 PM. On their way, they meet at a point P. The distances from station A to P and from station B to P bear the ratio:

2023•EPFO APFC•General Studies• Q.53

Full Question

53. A train starting from rest with a uniform acceleration attains a speed of 108 km/h in 5 minutes. The distance covered by the train in attaining the speed is

2023•EPFO APFC•General Studies• Q.109

Full Question

109. Which of the following sets the scope, timing and direction of the audit, and guides the development of the more detailed audit plan?

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