tricks to solve blood relations reasoning


Introduction :

Blood Relations Based Question are very common in all type of examination where you have been given relationship among few members of the family and based on given details you need to find out the ‘Unknown’ relation that exists satisfying the given criteria.

Questions depict relationships among the various members of a family in a roundabout chain.

The candidate is expected to find the relation of two particular persons mentioned in the question.

Generally, the question deals with a hierarchical structure which is based on seven generation three above & three below like this:

Generation Male Female
Three generations above↑↑↑Great-grandfather
Maternal great-grandfather
Great grandfather-in-law
Maternal great grandmother
Great grandmother-in-law
Two generations above ↑↑Grandfather
Maternal grandfather
Maternal grandmother
One generation above ↑Father, Uncle,
Maternal uncle, Father-in-law
Mother, Aunt
Maternal aunt, Mother-in-law
The current generation(Self) →Husband, Brother
Cousin, Brother-in-law
Wife, Sister
Cousin, Sister-in-law
One generation below ↓Son
Two generations below ↓↓Grandson
Three generations below ↓↓↓Great-grandson
Great grandson-in-law
Great grand daughter-in-law

(Source –bankexamstoday )

(This is the key to solve all type of Blood relation Problems )

Also, You need to understand the common terms used while describing the family & blood relations.

Family/Blood Relations Described

Sister of fatherAunt
Wife of uncleAunt
Son of father or motherBrother
Brother of husband or wifeBrother-in-law
Husband of sister/sister-in-lawBrother-in-law
Son/daughter of uncle/auntCousin
Granddaughter of father/motherDaughter or Niece
Wife of sonDaughter-in-law
Father’s father/mother onlyFather
Husband of motherFather
Son of grandfather/grandmotherFather/Uncle
Father of wife/husbandFather-in-law
Daughter of son/DaughterGranddaughter
Father of father or motherGrandfather
Husband of grandmotherGrandfather
Father-in-law of father/motherGrandfather
Mother of father or motherGrandmother
Wife of grandfatherGrandmother
Mother-in-law of father/motherGrandmother
Son of son/DaughterGrandson
Son’s/Daughter’s granddaughterGreat granddaughter
Father of grandfather or grandmotherGreat grandfather
Mother of grandfather or grandmotherGreat grandmother
Son’s/Daughter’s grandsonGreat Grandson
Sister of motherMaternal Aunt
Brother of motherMaternal Uncle
Only daughter-in-law of father’s father/father’s motherMother
Wife of fatherMother
Daughter of father-in-law/mother-in-law of fatherMother/Aunt
Mother of wife/husbandMother-in-law
Son of brother or sisterNephew
Daughter of brother/sisterNiece
Father’s/Mother’s only son/daughterOneself
Son of fatherOneself/Brother
Father of daughter/sonOneself/husband
Mother of son/daughterOneself/Wife
Children of same parentsSiblings
Daughter of father or motherSister
Sister of husband or wifeSister-in-law
Wife of brother/brother-in-lawSister-in-law
Grandson of father/motherSon/Nephew
Husband of daughterSon-in-law
Son of second wife of fatherStep brother
Second wife of fatherStep mother
Daughter of second wife of fatherStep sister
Brother of fatherUncle
Husband of auntUncle

Important tips!

  • First of all choose the two persons, between whom the relationship is to be established.
  • Next, pinpoint the intermediate relationship i.e., such relationship through which long drawn relationship
    can be established between the required persons.
  • Finally, conclude the relationship directly between the two persons as per the requirement of the question.
  • From a particular name, we cannot ascertain the sex (gender) of that person. The name does not always
    show the gender beyond the reasonable doubt.
  • Never make an assumption about the sex of given relation based on the name provided
  • Always draw a pictorial diagram or Diagram based on Symbols to ascertain Family Tree Structure
  • Representation of family tree structure is important as if you are able to draw valid pictorial you will be able to solve any kind of problem(We will see how to draw diagram step by step later in this blog post)

Something not to do while solving the Blood relation problems

  • Few Teachers suggest ” to relate the question to yourself e.g if a person’s name is given in the question and other relationships are related to him, try to put yourself on his place and relate yourself to him and this will help you in understanding the problem easily “.
  • The above method only works if the problem is in simple nature and only involve few levels of Relationship

How to Draw Family Tree Diagram

You can draw tree diagrams in the following fashion.

  • Use vertical lines to represent parent-child relationships.
  • Horizontal lines like <-> to denote marriages and dashed lines to represent sibling relationships. Apart from that, a sibling relationship can easily be established if they share the same root.
  • You can also add gender differentiation to it by using a + sign for male and – sign for female.
  • You can use (?) for the information that has not been provided to you.

For Example 





As we have now understood the method to draw the diagram let’s move forth and practice some questions

Before that let’s see what type of Blood Relationship Questions are asked in various formats.

They are different in representation but substantially there is no difference between them.

Mainly Questions on Blood Relations are of the following types:

  • Mixed-Up Relationship Descriptions
  • Coded Relations/Symbolically Coded
  • Puzzle-Based Question

(NET Exam Syllabus of Reasoning don’t provide exact information on what type of question can be asked but most of the time it has seen that Question asked are of a mixed nature )

Important Note-  Pattern of UGC NET EXAM is not as tough as Bank PO & CAT Exam so you should avoid solving tough and puzzle based question.  Also, Only one question come from this topic .

However, if we consider the pattern of the question we should practise them separately-

Let’s Solve a few Examples!

Type I – Mixed-Up Relationship Descriptions/Statements

The questions in this category are generally a dialogue/ conversation between two people and followed up with a question on the basis of the information provided in the conversation.

Given below are some examples.

D is the brother of B, M is the brother of B, K is the father of M and T is the wife of K. How is B related to T?

Pointing to a man in a photograph, a man said to a woman, “His mother is the only daughter of your father”.How is the woman related to the man in the photograph?

Above type of problem can be easily solved using pen and paper and start plotting the family tree diagram and the question will just fall into place.

Example –

Abbas said to Chand, “Your mother’s husband’s sister is my aunt.” How is the lady related to Abbas? (1) Brother (2) Daughter (3) Sister (4) Aunt (5) None of these


Lady’s father’s sister is Lady’s aunt. But this sister is also Abbas’s aunt. Therefore Lady (Chand) is Abbas’s sister.

Hence, the answer is (3) Sister.

Give a Try for Below Question 

 Read the information carefully and answer the question given below it.

  1. A family consists of 6 members P, Q , R, X, Y, Z.
    2. Q is the son of R but R is not mother of Q.
    3. P and R are married couple.
    4. Y is the brother of R, X is the daughter of P.
    5. Z is the brother of P.

Questions :

  1. Who is the brother in law of R?
  2. How many female members are there in the family?
  3. How is Q related to X?
  4. How is Y related to P?

Type II- Coded Relations/Symbolically Coded

In this type, relationships represented by codes and symbols like + , – , / , *. You have to analyze the required relation based on the given code. In this also you may need diagrammatic representation of problem to solve it. Use the same representation used in mixed blood relations.

In the coding equation better to solve the code from the last letter.

If P+Q means P is the husband of Q, P/Q means P is the sister of Q, P*Q means P is the son of Q. how is D related to A in D*B+C/A?

Solution :

           C/A               –  C is the sister of Q.

           B+C/A          –   B is brother in law of A (sister’s husband – brother in law.

           D*B+C/A     –  D is the nephew of A (sister’s husband’s son means sister’s son i.e. nephew).

So, the answer is Nephew.

Type III- Puzzle Based Question on Blood Relations

This type of Question is the mixture of other reasoning concepts like seating arrangement, direction problem, statement & conclusion and others.

So far, It has been not seen much questions were asked in the NET exam on these types but as NTA NET exam is online now and would be chances to have these types.

the most important aspect of this is there will be multiple questions based on the same set of instruction provided in one question; SO if you draw the incorrect family tree or pictorial Diagram chances are very high that you end of making mistake for all question.

The key aspect of solving these type of problem is “Practise as Much as you can ” 

Directions (6 – 10): Study the following information and answer the questions given below.
Eight persons A, B, C, D, E, F, G and H are sitting around a circular table facing the centre, but not necessarily in the same order.
  • A’s the only son sits second to the left of F’s daughter, who is not E. B’s daughter G is an immediate neighbour of F’s daughter.
  • D’s mother sits opposite to G and sits is third to the left of C’s son. D’s sister and D’s mother are immediate neighbours of B’s sister, who is not sitting opposite any female.
  • G’s father is B, who is the son of C. D’s sister F, sits opposite E’s grandfather C, who is the father of D.
  • C is an immediate neighbour of D’s nephew, who is not the son of F.

6. Who among the following sits opposite to H?
a) C
b) E
c) A
d) D
e) G

7. Who among the following is D’s mother?
a) B
b) G
c) A
d) H
e) C

8. If B’s daughter and D’s mother interchange their positions then who among the following sits third to the left F’s sister?
a) B
b) A
c) H
d) F
e) None of these

9. Four of the following five are alike in a certain way find the one who does not belong to the group?
a) HB
b) FG
c) EB
d) CA
e) DH

10. Who among the following sit third to the right of E?
a) B
b) F
c) D
d) G
e) B

Answer : –

(Try Your Self – Below will Pictorial Diagram of Solution…. Check Answer from Diagram ….)

Tricks to Solve Blood Relations Problems in Reasoning


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