15+ High‑Level CAT Blood Relation Questions You Should Practise Today

Overview: Mastering the CAT Blood relation questions can really help you boost your scores. Check out the 15+ high-level blood relation CAT questions for 2026 here!

Blood reaction is one of the most frequently asked and often tricky topics in the logical reasoning section of the CAT Exam.

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Questions based on the blood relations test your ability to analyse family connections, relationships, and logical chains quickly. 

Though the number of blood relation CAT questions seems small, their difficulty and time‑consuming nature make them critical for boosting your overall percentile.

Here we have provided 15+ most important CAT Blood Relation questions to help you strengthen this high‑scoring part of your CAT preparation.

What are CAT Blood Relation Questions?

Blood relation CAT questions assess a candidate's ability to interpret familial relationships based on given clues. 

These blood relation CAT questions are designed to evaluate logical thinking and understanding of family hierarchies such as parents, grandparents, siblings, cousins, and more. 

They often involve deciphering relationships through statements, family trees, and coded relations, making them essential for scoring well in the reasoning section.

Read More: How to Prepare for Data Interpretation for CAT Exam

Types of Relationships to Solve CAT Blood Relation Questions 2026

 Here are the types of relations, both maternal and paternal side that will help you solve the questions more easily and frequently:

Relationship Description	Relation Name
Mother’s or Father’s Son	Brother
Mother’s or Father’s Daughter	Sister
Father’s Brother	Uncle
Father’s Sister	Aunt
Father’s Father	Grandfather
Father’s Mother	Grandmother
Mother’s Brother	Maternal Uncle
Mother’s Sister	Maternal Aunt
Son’s Wife	Daughter‑in‑law
Daughter’s Husband	Son‑in‑law
Husband’s or Wife’s Sister	Sister‑in‑law
Husband’s or Wife’s Brother	Brother‑in‑law
Brother’s Son	Nephew
Brother’s Daughter	Niece
Sister’s Husband	Brother‑in‑law
Brother’s Wife	Sister‑in‑law
Mother’s Father	Maternal Grandfather
Mother’s Mother	Maternal Grandmother

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15+ Most Important Easy level CAT Blood Relation Questions 2026

1. Rajesh introduces a woman to his friend by saying, “She is the daughter of my father’s only son.” If Rajesh has no siblings, how is the woman related to Rajesh?

A. Sister
B. Niece
C. Daughter
D. Cousin
Correct Answer: C. Daughter

2. Meena pointed to a man and said, “He is the son of my grandfather’s only son.” How is the man related to Meena?

A. Brother
B. Uncle
C. Cousin
D. Father
Correct Answer: A. Brother

3. Ravi said, “The woman at the counter is my mother’s husband’s sister.” How is the woman related to Ravi?

A. Aunt
B. Mother
C. Sister-in-law
D. Grandmother
Correct Answer: A. Aunt

4. Amit said, “The boy in the red shirt is my father’s only grandson.” Amit has a son named Priyansh. How is the boy related to Amit?

A. Son
B. Nephew
C. Brother
D. Cousin
Correct Answer: A. Son

5. Priya says, “That man is the husband of my mother’s sister.” How is the man related to Priya?

A. Maternal Uncle
B. Brother-in-law
C. Father
D. Cousin
Correct Answer: A. Maternal Uncle

6. Vikas introduces a man by saying, “He is my father’s wife’s son.” If Vikas is the only child, how is the man related to Vikas?
A. Brother
B. Father
C. Self
D. Cousin
Correct Answer: C. Self

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Moderate Level CAT Blood Relation Questions 2026

7. Arjun says, “She is the wife of my mother’s son.” How is the woman related to Arjun?

A. Sister-in-law
B. Sister
C. Aunt
D. Cousin
Correct Answer: A. Sister-in-law

8. Sita said, “The man in the picture is my husband’s father’s only son.” How is the man related to Sita?

A. Father-in-law
B. Husband
C. Brother-in-law
D. Uncle
Correct Answer: B. Husband

9. Neha points to a girl and says, “She is the only daughter of my father’s father.” How is the girl related to Neha?

A. Aunt
B. Mother
C. Sister
D. Cousin
Correct Answer: A. Aunt

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10. Karan said, “The man is my mother’s husband’s father.” How is the man related to Karan?

A. Grandfather
B. Father
C. Uncle
D. Cousin
Correct Answer: A. Grandfather

11. Renu says, “That boy is the son of my sister’s father.” How is the boy related to Renu?

A. Brother
B. Cousin
C. Nephew
D. Uncle
Correct Answer: A. Brother

12. Manoj says, “The person in the photo is the son of my grandfather’s son.” How is the person related to Manoj?

A. Brother
B. Father
C. Cousin
D. Uncle
Correct Answer: A. Brother

Read more: CAT Ratio and Proportion Questions

13. Pooja says, “She is the daughter of my father’s only sister.” How is the girl related to Pooja?

A. Cousin
B. Sister
C. Aunt
D. Niece
Correct Answer: A. Cousin

14. Anita says, “The man in the white shirt is my father’s son.” How is the man related to Anita?

A. Brother
B. Father
C. Self
D. Cousin
Correct Answer: Either A. Brother or C. Self (if man is Anita herself in male form context)

15. Tarun says, “The woman is the mother of my father’s children.” How is the woman related to Tarun?

A. Mother
B. Aunt
C. Sister
D. Grandmother
Correct Answer: A. Mother

Difficult Level CAT Blood Relation Questions 

16. Ajay introduces a woman by saying, “She is the daughter of my wife’s brother’s father.” How is the woman related to Ajay?

A. Sister-in-law
B. Cousin
C. Wife
D. Aunt
Correct Answer: C. Wife

17. Deepak says, “This boy’s father is my father’s son, and I have no brother.” How is the boy to Deepak?
A. Son
B. Cousin
C. Nephew
D. Self
Correct Answer: A. Son

18. Aman says, “The man is the husband of the sister of my mother’s son.” How is the man related to Aman?

A. Brother-in-law
B. Uncle
C. Father
D. Cousin
Correct Answer: A. Brother-in-law

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19. Sonia says, “The woman is married to my paternal uncle’s son.” How is the woman related to Sonia?

A. Sister-in-law
B. Cousin’s wife
C. Aunt
D. Friend
Correct Answer: B. Cousin’s wife

20. Varun says, “The boy is the son of my mother’s daughter-in-law.” How is the boy related to Varun?

A. Son
B. Nephew
C. Cousin
D. Brother
Correct Answer: A. Son

21. Raghav says, “This man’s wife is my wife’s sister’s mother.” How is the man related to Raghav?

A. Father-in-law
B. Father
C. Uncle
D. Brother-in-law
Correct Answer: A. Father-in-law

22. Kavita says, “The lady is my father’s son’s daughter’s mother.” How is the lady related to Kavita?

A. Sister-in-law
B. Self
C. Mother
D. Aunt
Correct Answer: B. Self

23. Ashok says, “The girl is my niece’s mother.” How is the girl related to Ashok? 
A. Sister
B. Sister-in-law
C. Wife
D. Cousin
Correct Answer: B. Sister-in-law

24. Madhu says, “The boy’s mother is the sister-in-law of my mother’s only son.” How is the boy related to Madhu?

A. Nephew
B. Cousin
C. Brother
D. Son
Correct Answer: A. Nephew

25. Naveen says, “The woman is my mother’s husband’s daughter’s daughter.” How is the woman related to Naveen?

A. Daughter
B. Niece
C. Cousin
D. Sister
Correct Answer: B. Niece

26. Prakash says, “The woman I pointed to is the mother of the father of my brother’s son.” How is the woman related to Prakash?

A. Mother
B. Grandmother
C. Aunt
D. Sister-in-law
Correct Answer: A. Mother

27. Sanjay says, “The person standing next to my father’s brother is my mother’s brother-in-law.” How is the person related to Sanjay?

A. Uncle
B. Father
C. Cousin
D. Brother
Correct Answer: A. Uncle

28. Aarti said, “That girl’s father is my father’s son-in-law.” How is the girl related to Aarti?

A. Daughter
B. Niece
C. Cousin
D. Sister
Correct Answer: A. Daughter

29. Rohit says, “The man sitting in the car is the father of my wife’s husband.” How is the man related to Rohit?

A. Father
B. Father-in-law
C. Uncle
D. Cousin
Correct Answer: B. Father-in-law

30. Sheetal points to a boy and says, “He is the son of the husband of my husband’s sister.” How is the boy related to Sheetal?

A. Nephew
B. Cousin
C. Son
D. Brother-in-law
Correct Answer: A. Nephew

31. Ajit says, “That woman is the daughter-in-law of the father of my father.” How is the woman related to Ajit?

A. Mother
B. Aunt
C. Grandmother
D. Sister-in-law
Correct Answer: A. Mother

32. Rina says, “The boy’s father is my grandfather’s only son.” How is the boy related to Rina?

A. Brother
B. Father
C. Cousin
D. Uncle
Correct Answer: A. Brother

33. Rahul says, “The man at the counter is the father of my mother’s granddaughter.” How is the man related to Rahul?

A. Father
B. Brother
C. Son
D. Cousin
Correct Answer: A. Father

34. Tina said, “The man’s wife is the grandmother of my daughter.” How is the man related to Tina?

A. Father-in-law
B. Grandfather
C. Father
D. Uncle
Correct Answer: A. Father-in-law

35. Dev says, “The girl I’m looking at is the sister of my father’s only son.” How is the girl related to Dev?

A. Sister
B. Cousin
C. Mother
D. Aunt
Correct Answer: A. Sister

Types of Blood Relation Questions in CAT 2026

CAT exams typically feature several categories of blood relation questions:

• Direct Questions: Straightforward relationship identification.
• Puzzle-Based Questions: Complex family relations requiring creation of family charts.
• Code-Based Questions: Relationships represented through symbols or codes.
• Single Person Relations: Identifying relations involving one individual.
• Mixed Blood Relations: Scenarios with multiple family members and relationships.

Read more: DILR Topics in CAT 

Key Concepts for Solving CAT Blood Relation Questions 2026

To excel in blood relation questions, candidates should familiarise themselves with essential concepts:

Family Tree Visualisation

A family tree visually depicts relationships, helping to analyse complex family connections efficiently. Drawing a family tree simplifies deciphering relations like great-grandparents, uncles, aunts, nieces, and nephews.

Symbols and Notations

• Male Member: Usually represented by a dash (-)
• Female Member: Usually represented by a plus (+)
• Marriage: Symbolized by '=', connecting spouses
• Siblings: Connected via horizontal lines
• Intergenerational Relationships: Vertical lines extending downward

Relationship Pointers

• Focus on key phrases such as "mother’s son," "brother’s daughter," or "daughter of my father’s wife."
• Use logic to connect clues and build the family chart step-by-step.

Tricks and Tips for Quick and Accurate Solutions

• Use Symbols: Represent family members with consistent symbols for clarity.
• Create Family Trees: Drawing relationships visually is the most effective way.
• Focus on Keywords: Words like mother, son, aunt, uncle, grandfather, help identify relationships quickly.
• Break Down Statements: Simplify complex sentences step by step.
• Practice Regularly: Consistent practice with varied questions enhances speed and confidence.

Conclusion

CAT Blood Relation Questions might look intimidating at first, but once you get the hang of family trees, analyze clues carefully, and practice regularly, you’ll find they’re not as tricky as they seem.

If you can decode family relationships accurately, you’ll be able to solve them faster and grab those easy marks in the CAT reasoning section.

By using smart visualisation techniques, simple symbols, and tried‑and‑tested problem‑solving methods, you can tackle blood relation questions with confidence and give your overall percentile a solid boost.

So, start working through a variety of questions today and watch your logical reasoning skills reach the next level!