Blood and Family Relations

Blood and Family Relations is an important reasoning ability topic that tests your understanding of family relationships, generations, gender clues, and relation mapping.

Reasoning Ability Blood and Family Relations Competitive Exams

Blood and Family Relations is an important reasoning ability topic that tests your understanding of family relationships, generations, gender clues, and relation mapping. These questions are commonly asked in competitive exams to check logical interpretation and diagram-based reasoning.

What are Blood and Family Relations?

Blood and Family Relations questions are based on relationships among family members such as father, mother, brother, sister, son, daughter, uncle, aunt, grandfather, grandmother, cousin, husband, and wife.

In these questions, information is given in words, and you must identify the correct relationship between two people. The best method is to convert the statement into a simple family tree or generation chart.

Quick idea: Identify gender, generation level, and direct relation first. Then connect the persons step by step.

Relation	Meaning	Generation Level
Father / Mother	Parent of a person	One generation above
Son / Daughter	Child of a person	One generation below
Brother / Sister	Sibling of a person	Same generation
Grandfather / Grandmother	Parent of parent	Two generations above
Grandson / Granddaughter	Child of child	Two generations below

“Family relation questions become easy when every person is placed at the correct generation level.”

Reasoning Tip

Key points

Identify gender clues carefully.
Mark male and female symbols if needed.
Place parents one level above children.
Place siblings on the same level.
Read the question from the last person if confused.
Draw a small family tree for complex questions.

family tree generation gender relation

Common Family Relation Terms

Understanding common relation terms is the foundation of solving blood relation questions.

Term	Meaning	Example
Paternal	Related to father’s side	Father’s father = paternal grandfather
Maternal	Related to mother’s side	Mother’s mother = maternal grandmother
Uncle	Brother of father or mother	Father’s brother or mother’s brother
Aunt	Sister of father or mother	Father’s sister or mother’s sister
Cousin	Child of uncle or aunt	Uncle’s son or aunt’s daughter
Nephew	Brother’s or sister’s son	My sister’s son is my nephew
Niece	Brother’s or sister’s daughter	My brother’s daughter is my niece
Sibling	Brother or sister	Two children of the same parents

Rule: Do not assume gender unless it is clearly given. Names may be misleading in reasoning questions.

Common Types of Blood Relation Questions

Competitive exams ask blood relation questions in different styles. The following types are common.

Direct Relation

Simple relation between two people.

A is B’s father
B is C’s sister
Find A’s relation to C
Use direct mapping

Pointing Type

Relation is described while pointing to a person.

Pointing to a photo
“He is my father’s son”
Identify speaker first
Then identify photo person

Coded Relation

Symbols represent relations.

A + B means A is father of B
A - B means A is sister of B
Decode symbols
Draw relation chain

Family Tree

Several family members are connected.

Multiple persons
Generations involved
Use diagram
Track gender and marriage

Exam approach: Identify whether the question is based on direct relation, pointing statement, coded relation, or family tree arrangement.

Relation Pattern Bank

Parent Side

Father’s father → grandfather
Mother’s mother → grandmother
Parent’s sibling → uncle/aunt

Child Side

Son’s son → grandson
Daughter’s daughter → granddaughter
Child’s child → grandchild

Sibling Side

Brother’s son → nephew
Sister’s daughter → niece
Sibling’s child → nephew/niece

Marriage Side

Husband’s mother → mother-in-law
Wife’s father → father-in-law
Spouse’s sibling → brother/sister-in-law

Tip: Always move step by step. Do not jump directly from the first person to the last person.

Blood and family relations concept — **Blood and Family Relations** questions are solved by identifying gender, generation, and connection between family members.

Step-by-Step Solving Method

Step	Action	Example
Step 1	Identify all people mentioned in the question.	A, B, C, speaker, photo person
Step 2	Mark gender wherever given.	Male = father, son, brother; Female = mother, daughter, sister
Step 3	Place people at correct generation levels.	Parents above, children below, siblings same level
Step 4	Connect the relation step by step.	Father’s son = brother or self depending on speaker
Step 5	Answer exactly what is asked.	How is A related to B? Do not reverse the relation.

Important: Relation direction matters. “A is father of B” is not the same as “B is father of A”.

Solved Examples

Question	Method	Answer
A is the father of B. B is the sister of C. How is A related to C?	A is father of B. B and C are siblings. Therefore, A is also father of C.	Father
Pointing to a man, Ravi said, “He is the son of my father.” Who is the man?	“My father’s son” means Ravi himself or Ravi’s brother. Since Ravi is pointing to another man, he is Ravi’s brother.	Brother
A woman says, “This girl is the daughter of my only son.” How is the girl related to the woman?	Woman’s only son has a daughter. Son’s daughter is granddaughter.	Granddaughter
A is the brother of B. B is the mother of C. How is A related to C?	B is mother of C. A is brother of B. Mother’s brother is maternal uncle.	Uncle
P is the sister of Q. Q is the father of R. How is P related to R?	Q is father of R. P is sister of Q. Father’s sister is aunt.	Aunt
A is the son of B. B is the daughter of C. How is C related to A?	B is daughter of C, so C is parent of B. A is son of B. Parent’s parent is grandparent.	Grandparent
Pointing to a photo, Meena said, “He is the father of my mother.” Who is he?	Mother’s father is maternal grandfather.	Grandfather
A is the husband of B. B is the sister of C. How is A related to C?	B is sister of C. A is husband of B. Sister’s husband is brother-in-law.	Brother-in-law

Note: In pointing questions, identify the speaker first and then decode the relation.

Common Traps and Shortcuts

Common Traps

Reversing the relation asked in the question.
Assuming gender from name without clear clue.
Confusing father’s side and mother’s side.
Forgetting that “father’s son” may mean self or brother.
Not identifying the speaker in pointing questions.
Mixing uncle, aunt, cousin, nephew, and niece.

Useful Shortcuts

Use M for male and F for female while drawing.
Put parents above and children below.
Place siblings on the same line.
Use a horizontal line for marriage relation.
Read the question from the last relation if it is confusing.
Answer exactly in the direction asked.

Exam approach: Identify whether the problem is based on direct relation, pointing to a person, family tree, coded relations, or generation gap.

Practice

A) Multiple Choice Questions

A is the father of B. B is the brother of C. How is A related to C?
Brother Father Uncle Grandfather
Pointing to a girl, Raj said, “She is the daughter of my mother.” Who is the girl?
Mother Sister Daughter Aunt
A is the mother of B. B is the father of C. How is A related to C?
Mother Grandmother Sister Aunt
P is the brother of Q. Q is the mother of R. How is P related to R?
Father Uncle Brother Grandfather
A is the daughter of B. B is the son of C. How is C related to A?
Parent Grandparent Sibling Cousin

B) Solve the Higher-Order Problems

Pointing to a man, Sita said, “His mother is the only daughter of my mother.” How is the man related to Sita? (Hint: My mother’s only daughter = Sita herself.)
A is the sister of B. B is the father of C. C is the brother of D. How is A related to D? (Hint: Father’s sister relation.)
P is the husband of Q. Q is the mother of R. R is the sister of S. How is P related to S? (Hint: Husband of mother = father.)
X is the son of Y. Y is the brother of Z. Z is the mother of W. How is X related to W? (Hint: Children of siblings are cousins.)
A is the father of B. B is the daughter of C. C is the mother of D. How is A related to D? (Hint: Identify relation between A and C first.)

C) Match the Relation with the Correct Meaning

Relation	Correct Meaning
Father’s father	Grandfather
Mother’s brother	Uncle
Sister’s son	Nephew
Brother’s daughter	Niece
Uncle’s child	Cousin
Son’s daughter	Granddaughter

Reasoning Reminder

Blood and family relation questions require careful reading and correct mapping of persons. The main points are gender, generation level, speaker identity, and relation direction. Drawing a simple family tree helps avoid mistakes in complex questions.

Task: Create five family relation questions using father, mother, brother, sister, uncle, aunt, cousin, and grandparent relationships.

Show Suggested Answers

Multiple Choice

Father
A is father of B. B and C are siblings. Therefore, A is also father of C.
Sister
“Daughter of my mother” means Raj’s sister, assuming the girl is not Raj himself.
Grandmother
A is mother of B. B is father of C. Therefore, A is grandmother of C.
Uncle
Q is mother of R. P is brother of Q. Therefore, P is R’s uncle.
Grandparent
A is daughter of B. B is son of C. Therefore, C is grandparent of A.

Higher-Order Problems

“My mother’s only daughter” means Sita herself.
The man’s mother is Sita.
Therefore, the man is Sita’s son.
A is sister of B. B is father of C. C and D are siblings.
So B is father of D also.
A is father’s sister of D.
Answer = Aunt.
P is husband of Q. Q is mother of R. R and S are siblings.
Therefore, Q is also mother of S.
P is father of S.
Answer = Father.
X is son of Y. Y is brother of Z. Z is mother of W.
Y and Z are siblings. Their children X and W are cousins.
Answer = Cousin.
A is father of B. B is daughter of C. C is mother of D.
Since B is daughter of both A and C, A is husband of C.
D is also child of C. Therefore, A is father of D.
Answer = Father.

Concept Matching

Father’s father → Grandfather
Mother’s brother → Uncle
Sister’s son → Nephew
Brother’s daughter → Niece
Uncle’s child → Cousin
Son’s daughter → Granddaughter

Clue Explanation

Family relation questions should be solved step by step. Identify the speaker, gender, generation level, and final relation direction. A small family tree avoids most mistakes.

Exam tips

Identify the speaker first in pointing questions.
Do not assume gender unless clearly given.
Use generation levels while drawing.
Read the final question carefully: A to B or B to A.
Use symbols for male, female, marriage, and siblings.
Verify the final relation before selecting the answer.

Practice MCQs

Learning Modules