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Blood Relations, Venn, Indexing & Address Matching

Reasoning & General Intelligence — Paper-I · Official 2026 Coverage

Useful for: SSC CGL

Overview

This mixed topic tests family-tree reasoning, Venn relationships, dictionary indexing and careful matching of addresses or codes.

Key points

Mark generations and gender only when stated.
Venn: identify subset, overlap or separate relations between groups.
Indexing: dictionary order compares the first differing letter; shorter word first if the start is the same.
Address matching: compare house number, street, area, city and PIN in order.
Small differences (letters, digits, spacing) decide address questions.

Explanation

Read pointing statements from the speaker outwards.
Three-set Venn: check every overlap region.
In indexing, ignore spaces and punctuation unless stated.
Compare addresses column by column to avoid misses.

Step by step

Identify the pattern, rule or relationship.
Apply it carefully to the question part.
Verify against every condition before marking.

Examples

"He is the son of my father’s only son" — said by a man → the son is the speaker’s son.
Teachers, Women, Mothers → overlapping circles with mothers inside women.
Dictionary order: Plant, Plane, Planet, Plan → Plan, Plane, Planet, Plant.

Traps and advanced points

Trap: Assuming gender.
Trap: Treating overlaps as subsets.
Trap: Missing a one-digit difference in PIN codes.

Quick revision

Draw trees.
Subset/overlap/separate.
Compare field by field.

Practice MCQs

Neel Das is the brother of Diya Das. Diya Das is the mother of Pooja Das. How is Neel Das related to Pooja Das?
1. Father
2. Mother
3. Maternal uncle
4. Paternal aunt
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Answer: (c) Maternal uncle. The stated links make the required relation Maternal uncle.
Rohan Sharma is the father of Tara Sharma. Tara Sharma is the sister of Vikram Sharma. How is Rohan Sharma related to Vikram Sharma?
1. Mother
2. Father
3. Paternal aunt
4. Maternal uncle
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Answer: (b) Father. The stated links make the required relation Father.
Aarav Rao is the father of Diya Rao. Diya Rao is the sister of Kabir Rao. How is Aarav Rao related to Kabir Rao?
1. Paternal aunt
2. Mother
3. Maternal uncle
4. Father
Read chapter notes · Similar questions
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Answer: (d) Father. The stated links make the required relation Father.
Nisha Rao is the sister of Karan Rao. Karan Rao is the father of Dev Rao. How is Nisha Rao related to Dev Rao?
1. Mother
2. Paternal aunt
3. Father
4. Maternal uncle
Read chapter notes · Similar questions
Show answer
Answer: (b) Paternal aunt. The stated links make the required relation Paternal aunt.
Karan Khan is the brother of Sana Khan. Sana Khan is the mother of Nisha Khan. How is Karan Khan related to Nisha Khan?
1. Mother
2. Father
3. Paternal aunt
4. Maternal uncle
Read chapter notes · Similar questions
Show answer
Answer: (d) Maternal uncle. The stated links make the required relation Maternal uncle.
Meera Rao is the sister of Rohan Rao. Rohan Rao is the father of Arjun Rao. How is Meera Rao related to Arjun Rao?
1. Mother
2. Father
3. Paternal aunt
4. Maternal uncle
Read chapter notes · Similar questions
Show answer
Answer: (c) Paternal aunt. The stated links make the required relation Paternal aunt.
Aarav Sharma is the father of Diya Sharma. Diya Sharma is the sister of Kabir Sharma. How is Aarav Sharma related to Kabir Sharma?
1. Mother
2. Paternal aunt
3. Maternal uncle
4. Father
Read chapter notes · Similar questions
Show answer
Answer: (d) Father. The stated links make the required relation Father.
Meera Sharma is the mother of Rohan Sharma. Rohan Sharma is the brother of Tara Sharma. How is Meera Sharma related to Tara Sharma?
1. Paternal aunt
2. Mother
3. Father
4. Maternal uncle
Read chapter notes · Similar questions
Show answer
Answer: (b) Mother. The stated links make the required relation Mother.
Aarav Sharma is the brother of Kavya Sharma. Kavya Sharma is the mother of Nisha Sharma. How is Aarav Sharma related to Nisha Sharma?
1. Father
2. Maternal uncle
3. Mother
4. Paternal aunt
Read chapter notes · Similar questions
Show answer
Answer: (b) Maternal uncle. The stated links make the required relation Maternal uncle.
Sana Sharma is the sister of Dev Sharma. Dev Sharma is the father of Arjun Sharma. How is Sana Sharma related to Arjun Sharma?
1. Mother
2. Father
3. Maternal uncle
4. Paternal aunt
Read chapter notes · Similar questions
Show answer
Answer: (d) Paternal aunt. The stated links make the required relation Paternal aunt.