Blood relation is one of the most frequently appearing topics of logical reasoning. It shows the different relations among members of a family. Based on the information, a candidate is required to identify particular family members.

It tests the analytical skills of the students and how they approach a logical problem using a diagram or a pattern. Scoring marks in this topic is easier as compared to other topics in the reasoning section. The only thing, you need to remember is the blood relations in between family members.

Blood Relation Example:

Directions: Study the following information carefully and answer the questions given below:

Eight persons – Sarin, Rahi, Akasa, Pavi, Preet, Gunjan, Taran and Namya belong to a family which consists of three generations and two married couples.

Preet is the sister of only son of Akasa. Pavi is the daughter in law of Sarin. Rahi is the mother of Akasa. Sarin is the grandfather of Taran who is the daughter of Pavi. Namya is the maternal uncle of Gunjan.

How many male members are there in the family?

A. Three
B. Four
C. Five
D. Six
E. Either Four or Five

Ans. B

Following the final solution we can say that there are four male members in the family.

Hence, the correct answer is option B.

Final Solution:

Common Explanation:

Reference:

Eight persons – Sarin, Rahi, Akasa, Pavi, Preet, Gunjan, Taran and Namya belongs to a family which consists of three generations and two married couples.

Inference:

We will keep this information mind while solving the puzzle.

Reference:

Preet is the sister of only son of Akasa.

Rahi is the mother of Akasa.

Inference:

After using the above hints, we can draw a following blood chart:

Reference:

Sarin is the grandfather of Taran who is the daughter of Pavi.

Pavi is the daughter in law of Sarin.

Inference:

After using the given hints, above blood chart can be redrawn as:

Reference:

Namya is the maternal uncle of Gunjan.

Inference:

With the help of above hints we can say that Namya is the brother of Pavi and Gunjan is the son of Pavi.

This is a simple question, which involves a step by step connection of relation between members.

You can begin, by picking up a family member, for example, Preet and then establishing his/ her relationship with the other members until every member becomes inter-connected.

Also, do not assume the gender unless it has been specified in the question or it may result in an incorrect answer.

List of Competitive exams where Blood relations form a part of the reasoning ability section:

• IBPS PO
• IBPS Clerk
• IBPS RRB
• IBPS SO
• SBI PO
• SBI CLERK
• SBI SO
• CAPF
• Railway Recruitment Board (NTPC)
• Railway Recruitment Board Assistant Loco Pilot (ALP)
• SSC
• CISF

## Concept of Blood Relation

Blood relations denote any relation in the world which is either by birth or by marriage.

For example: A relation by birth includes father, mother, son and daughter, and a relation by marriage includes father-in-law, brother-in-law etc.

Here’s the list of different relations you need to know so as to solve the questions:

 Relationship Terms Used Father's son or mother's son Brother Father's daughter or mother's daughter Sister Mother's brother (younger or elder) Maternal Uncle Father's brother (younger or elder) Uncle (Paternal) Father's sister (younger or elder) Aunt Mother's sister (younger or elder) Aunt Son's wife Daughter-in-law Daughter's husband Son-in-law Sister's husband Brother-in-law Husband's brother or wife's brother Brother-in-law Brother's wife Sister-in-law Husband's sister or wife's sister Sister-in-law Husband's father or wife's father Father-in-law Husband's mother or wife's mother Mother-in-law Brother's son or sister's son Nephew Brother's daughter or sister's daughter Niece Uncle's daughter or aunt's daughter Cousin Uncle's son or aunt's son Cousin Father's father or mother's father Grandfather Father's mother or mother's mother Grandmother Father of grandfather or father of grandmother Great grandfather Mother of grandfather or Mother of grandmother Great grandmother

Tips on finding the relationship between two family members:

1) The first step is to choose from the two persons between whom the relationship needs to be established.

2) Once you have chosen the two persons, you need to draw out the list of the intermediate relationship between the two persons. One needs to carefully identify and map the list of relationship in between. A mistake here can lead to an incorrect answer.

3) The last step is to conclude the relationship between the two persons

To ease the process, between the gender of a male and female, you can use the plus or box sign for the male and negative/minus or the circle sign for the female.

To depict a relation between siblings you can use a ‘——‘, whereas, for a couple, you can use a ‘==‘. This will help you bring in clarity and help solve the questions quickly.

## Types of Blood relations

1. Description based

These type of questions present the relations among family members in a jumbled manner. One needs to decode the description in order to establish the correct order among family members.

Example:

Looking at a picture of a boy, Hemant said, “His mother is the wife of my father’s son. Brothers and sisters I have none.” At whose picture was Hemant looking?

A. His son
B. His cousin
C. His uncle
D. His nephew
E. None of these

Ans. A

Since Hemant has no brother or sister, so he is his father’s only son.

So, wife of Hemant’s father’s son — Hemant’s wife.

Thus, Hemant’s wife is the boy’s mother or the boy is Hemant’s son.

Hence, the option A is correct.

2. Relation based

In comparison to the previous category, these type of questions are quite simple as information about the family members is straightforward. However, these questions may involve more than one family.

One can make a family tree to solve the question at the start. Once a question is mastered, one can solve the questions by understanding the information directly.

Example:

Directions: Read the following information carefully and answer the questions given beside.

G is the mother of F, who is the spouse of D. M is the daughter of D, who is the only brother of C. E is the son of G, who is married to H. A is the niece of C, who has no sister. T is the father of D and has no daughter. V is the sister-in-law of F.  G has only two children. M is the granddaughter of O.

How is V related to M?

A. Paternal aunt
B. Maternal aunt
C. Sister
D. Either A or B
E. None of these

Ans. B

V is the maternal aunt of M.

Hence option B is correct.

Family Tree:

Common Explanation:

Reference:

G is the mother of F, who is the spouse of D.

M is the daughter of D, who is the only brother of C.

A is the niece of C, who has no sister.

T is the father of D and has no daughter.

Inference:

As per first and second hints, it is clear that D is the husband of F.

As per last hint, we can say that C is also male.

Reference:

E is the son of G, who is married to H.

V is the sister-in-law of F.

G has only two children.

M is the granddaughter of O.

Inference:

As per first and second hints, it is clear that V is the wife of E and E is the brother of F.

3. Coded relations

These type of questions involve, coding of the blood relations and may be represented by various codes such as +/ - / \$ / & / @ etc.

The answers need to be obtained by decoding the relationships and then finding the relationship among members.

Example:

Directions: Read the following information carefully and answer the question given below:

If ‘A × B’ means ‘A is father of B’.

If ‘A + B’ means ‘A is wife of B’.

If ‘A ÷ B’ means ‘A is daughter of B’.

If ‘A – B’ means ‘A is son of B’.

How is L related to Q in the expression ‘L ÷ M × O – P ÷ Q’?

A. Granddaughter
B. Niece
C. Daughter-in-law
D. Daughter
E. Can’t be determined

Ans. A

It's clear from the family tree that L is granddaughter of Q.

Hence, the option A is correct.

## Blood relations based puzzle

The blood relations based puzzle, as the name suggests involves the combination of Blood relations along with seating arrangement.

Students need to combine both the concepts of blood relation and seating arrangement to solve these type of questions.

Example:

Directions: Kindly study the following information carefully and answer the question that follows:

In a family of six persons – Anu, Ayushi, Sohan, Ajay, Anupam and Anuj – there are three males and three females. There are two married couples and two persons are unmarried. Each one of them reads different newspapers, viz. Doctor, Engineer, Lawyer, Teacher, Writer and Architect.

Anupam, who works as Engineer, is mother-in-law of Anu, who is wife of Sohan. Ajay is the father of Anuj and he does not read Doctor or Architect. Ayushi works as Writer and is the sister of Anuj, who works as Lawyer. Sohan does not works as Architect.

Who among the following works as doctor?
A. Sohan
B. Ajay
C. Anu