INTRODUCTION
Problems on Blood Relation involve analysis of information showing blood relationship among members of a family. In the question, a chain of relationship is given in the form of information and on the basis of these information relation between any two members of the chain is asked. Students are supposed to be familiar with the knowledge of different relationship in a family.
| Mother's or father's son | Brother |
| Mother's or father's daughter | Sister |
| Mother's or father's brother | Uncle |
| Mother's or father's sister | Aunt |
| Mother's or father's father | Grand father |
| Mother's or father's mother | Grand mother |
| 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 |
| Uncle or aunt's son or daughter | Cousin |
| Sister's husband | Brother-in-law |
| Brother's wife | Sister-in-law |
| Grandson's or Grand daughter's daughter | Great grand daughter |
| Mother's brother | Maternal Uncle (Mama) |
| Father's younger brother | Uncle (Chacha) |
| Father's elder brother | Uncle (Tauji) |
| Father's sister | Aunty (Bhuaa) |
| Mother's sister | Maternal Aunty (Mousi) |
DIRECT - RELATIONSHIP
In these type of questions, around about description is given in the form of certain small relationship and you required to analysis the whole chain of relations and decipher the direct relationship between the persons concerned.
Ex.1 Aakash said to Mohit, “That boy in blue shirt is younger of the two brothers of the daughter of my father’s wife”. How is the boy in blue shirt related to Aakash”.
(A) Father
(B) Uncle
(C) Brother
(D) Nephew
Answer: (C) Brother
Daughter of my father’s wife means sister of Akash, blue shirt boy is yonger brother of sister of Akash, means blue shirt boy’s brother of Akash.
Ex.2 Point to a person, Rohit said to Neha, “His mother is the only daughter of your father”. How is Neha related to that person ?
(A) Aunt
(B) Mother
(C) Daughter
(D) Wife
Answer: (B) Person’s mother is only daughter of Neha’s father means neha herself is a mother of that person.
RELATION PUZZLE
In these type of questions, mutual blood relations or more than two persons are mentioned. The candidate is required to analyse the given information, work out a family chart and then answer the given questions.
Ex.3 Rohit and Rohan are brothers. Soniya and Sunita are sisters. Rohit’s son is Sunita’s brother. How is Rohan related to Soniya.
(A) Father
(B) Brother
(C) Grand Father
(D) Uncle
Answer: (D) Rohit’s son is Sunita’s brother means Rohit is Sunita’s father. Rohit and Rohan are brothers. Sunita and Soniya are sisters. So, Rohan is the uncle of Soniya.
CODED RELATION
In such questions, the relationship are represented by certain specific symbols such as
etc. The candidate is then required to analyse some given codes to determine then relatinoship between a set of persons, or to express a given relationship in the coded form.
Ex.4 A × B means A is the sister of B, A ÷ B means A is the daughter of B, A – B means A is the son of B. On the basis of this information you have to tell, how is P related to S in the relationship P – Q × R ÷ S
(A) Brother
(B) Son
(C) Grandson
(D) Daughter’s son
Answer: (D) According to the directions 
P is the son of the daughter of S.
Question. A woman introduces a man as the son of the brother of her mother. How is the man related to the woman ?
(A) Nephew
(B) Son
(C) Cousin
(D) Nephew
Answer: C
Question. Pointing to a person, a man said to a woman, “His mother is the only daughter of your father.” How was the woman related to the person?
(A) Aunt
(B) Mother
(C) Wife
(D) Daughter
Answer: B
Question. A girl introduced a boy as the son of the daughter of the father of her uncle. The boy is girl’s
(A) Brother
(B) Son
(C) Uncle
(D) Son-in-law
Answer: A
Question. Arun said, “This girl is the wife of the grandson of my mother.” Who is Arun to the girl ?
(A) Father
(B) Grandfather
(C) Husband
(D) Father-in-law
Answer: D
Question. Pointing towards a boy, Veena said, “He is the son of only son of my grandfather.” How is that boy related to Veena ?
(A) Uncle
(B) Brother
(C) Cousin
(D) Data inadequate
Answer: B
Question. Introducing Reena, Monika said, “She is the only daughter of my father’s only daughter.” How is Monika related to Reena ?
(A) Aunt
(B) Niece
(C) Cousin
(D) None of these
Answer: D
Question. A man said to a lady, “Your mother’s husband’s sister is my aunt.” How is the lady related to the man ?
(A) Daughter
(B) Grand daughter
(C) Mother
(D) Sister
Answer: D
Question. Pointing to a gentleman, Deepak said, “His only brother is the father of my daughter’s father’s only son.” How is the lady related to the girl ?
(A) Grandfather
(B) Father
(C) Brother-in-law
(D) Uncle
Answer: D
Question. Pointing to a man on the stage, Rashi said, “He is the brother of the daughter of the wife of my husband.” How is the man on the stage related to Rashi ?
(A) Son
(B) Husband
(C) Cousin
(D) Nephew
Answer: A
Directions : Read the following information and answer the questions given below :
A is the son of B. C, B’s sister, has a son D and a daughter E. F is the maternal uncle of D.
Question. How many nephews does F have ?
(A) Nil
(B) One
(C) Two
(D) Three
Answer: C
Question. A and B are married couple. X and Y are brothers. X is the brother of A. How is Y related to B ?
(A) Brother-in-law
(B) Brother
(C) Cousin
(D) None of these
Answer: A
Question. How is A related to D ?
(A) Cousin
(B) Nephew
(C) Uncle
(D) Brother
Answer: A
Question. A, B and C are sisters. D is the brother of E and E is the daughter of B. How is A related to D ?
(A) Sister
(B) Cousin
(C) Niece
(D) Aunt
Answer: D
Question. Deepak has a brother Anil. Deepak is the son of Prem. Bimal is Prem’s father. In terms of relationship, what is Anil of Bimal ?
(A) Son
(B) Grandson
(C) Brother
(D) Grandfather
Answer: B
Question. How is E related to F ?
(A) Sister
(B) Daughter
(C) Niece
(D) Wife
Answer: C