Study Notes Based on : Blood Relations

Dear Readers,
We are today providing you a Study Notes of Blood Relations for SSC CGL 2016,SSC CHSL, SSC CPO,


INTRODUCTION – Blood relation logical problems mainly deal with the hierarchical structure of a family i.e. grand-parents, parents and children etc.  Problems of this type involve analysis of certain blood relations and then inferring on the basis of the given information.

In these tests, the success of a candidate depends upon a knowledge of the Blood Relations, some of which are summarized below.

>Grandfather’s son  –  Father or Uncle

>Grandmother’s son  –  Father or Uncle

>Grandfather’s only son  –  Father

>Grandmother’s only son  –  Father
>Mother’s or father’s mother  –  Grandmother

>Son’s wife  –  Daughter-in-Law

>Daughter’s husband  –  Son-in-Law

>Husband’s or wife’s sister  –  Sister-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 Granddaughter’s daughter   –  Great grand daughter

Now let us discuss some of the examples to understand    .

01. Pointing to a photograph of man, Neha said, “He has no, sisters or daughters, but his mother is the only daughter of my mother.” How is the man in the photograph related to Neha’s mother?
(1) Brother-in-Law
(2) Grandson
(3) Nephew
(4) Can’t be determined
(5) None of these

Solution. (2) Man’s mother is the only daughter of Neha’s mother. Therefore, Neha’s mother is the grandmother of man. Hence man is the grandson of Neha’s mother.

02. Pointing to a boy, Purnima says, “He is the only son of the sister of my brother.” How is the boy related to Purnima?
(1) Can’t be determined
(2) Son
(3) Nephew
(4) Brother
(5) None of these

Solution. (1) If Purnima is the only daughter of her father then the boy is her son. But, here we do not know the number of sisters Purnima has.

03. Pointing to Priti, father of Rishu says, “She is the daughter of the daughter of the wife of the only son of the grandfather of my sister.” How is Sushama related of Priti if Sushama is the sister of Rishu’s father?
(1) Can’t say
(2) Mother
(3) Aunt
(4) Niece
(5) None of these

Solution. (1)


Now, if Sushma is the only sister of X then she is the mother of Priti, otherwise aunt.

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