Blood Relation Concepts: Reasoning

Blood Relations

To solve the blood relation questions easily we need to observe the family tree.  

If we assume we are in the middle then in your generation, we have sisters, brothers, cousins, Brother-in-law, sister-in-law. We can easily observe in each generation which of the relations we might have.

In solving the blood relation problems we usually assume the speaker is in the position "you" and try to prepare the diagram according to the question.

It is always best practice to denote Males and Females with notation.

Some general Relationships:

1. Brother                  Son of Mother or Father
2. Sister                     Daughter of Mother or Father
3. Aunt                      Sister of Mother or Father
4. Uncle                     Brother of Mother or Father
5. Cousin                   Son of Uncle or Aunt or Daughter of Uncle or Aunt
6. Grandmother         Mother of Father or Mother
7. Grandfather           Father of Father or Mother
8. Niece                     Daughter of Brother or Sister
9. Nephew                 Son of Brother or Sister
10.  Brother-in-law    Sister’s Husband or Brother of Wife or Husband
11. Sister-in-law        Brother’s Wife or Sister of Wife or Husband
12. Daughter-in-law  Wife of Son

Problems:

Pointing to a man, a lady says that his father is the third son of her grandmother. How is the lady related to that man?

Ans: Pointing to a man, a lady says that his father is the third son of her grandmother.

Always the question consists of two parts. The phrase before "is"  and the phrase after "is". Firstly draw the seperate diagrams for these two phrases and merge them.

Pointing to a man  a lady says that his father: 

FATHER

↓

MAN

The third son of her grandmother: 

GRAND MOTHER

↙↓↘

SON   SON   SON

Son of her grand mother means, that person is the lady's father or uncle.  

Merge the two diagrams above.  To the man the lady is pointing is son of one of these 3 sons. 

GRAND MOTHER

↙↓↘

SON SON  SON

                                                             ↙    ↓          ↘

                                                       MAN   LADY    MAN