How to approach Blood Relation questions?

In recent examinations, Blood relation puzzles are combined with Seating arrangement questions and Data sufficiency type questions.
In both the questions, it is highly essential that one must solve the blood relation puzzle before starting to solve seating arrangement or data sufficiency.
A clear methodology to solve blood relation puzzles will save a lot of time.

Relationships which are often confused:

Wife of brother	Sister -in- Law
Husband of Sister	Brother- in –law
Son of brother/ Son of Sister
Daughter of brother/Daughter of Sister
Brother of Father/Brother of Mother
Sister of Father/Sister of Mother
Son of Uncle/Son of Aunt
Daughter of Uncle/Daughter of Aunt

Understanding the puzzle:

Suppose a puzzle is,
Shakthi is the daughter of the man , who is the father of the husband of my mother .

1.Group the puzzle into characters from the back.

• husband of my mother – My Father 
• father of the husband of my mother – father of my father – my Grandfather 
• daughter of Grandfather – Sister of my father – My Aunt ( Shakthi ) 

In a data sufficiency question , Always be aware of the gender of the character and their siblings.

Example

My Grandfather’s only son – represents My father. But My Grandfather’s son may also represent My Uncle, in addition to my father.
For more complex puzzles with more than three characters specified, follow the pictorial representation.

Pictorial Representation:

An Illustration:

Try to draw the given puzzle in the above illustrated format .Practising many examples will give a good speed in drawing as above.
Draw the flow chart and fill the names as given in the question.

Example:

In a family, there are seven members, A,B,C,D,E, F and G. A and B are maried couple, A being a male member.D is the only son of C, who is the brother of A.E is the sister of D.  B is the daughter-in-law of F, who is the wife of G.

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