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  • Logical Reasoning

    Blood Relations Basics for CLAT

    Posted on: 2019-01-04 Posted by: CLAT Gurukul Category: Logical Reasoning

    Blood relation forms an important part of the reasoning section in most of the competitive exams. Blood relation shows the different relations among the members of a family. Based on the information given, you are required to find the relation between particular members of the family. Scoring marks in this topic is easier as compared to many other topics in the reasoning section. So, you must be well versed with types of relations that exist in a family.

    Here is the list of different types of relations you should know so as to solve questions based on this topic:
    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 a relationship between two members of a family:
    Step 1: The first and foremost step is to choose the two persons among whom the relationship is to be established.
    Step 2: Now once you have chosen the two persons, pin-point the intermediate relationship between two persons, i.e. such relationship through which long drawn relationship can be established between the required persons.
    Step 3: In the end, conclude the relationship between two required persons.
    Make sure that you represent the gender of a female with a "□" sign and that of a male with a "⊕ .
    Representation through diagram:




    ⊕=□ Husband-Wife
    ⊕-⊕ Brothers
    □-□ Sisters
    ⊕-□ Brother-Sister
    Types of questions
    • Based on Dialogue or conversation
    • Based on puzzles
    • Keep in mind that from a person's name, we cannot judge the gender of that person. The name doesn't always show the gender beyond a reasonable doubt.
    Solved Examples:
    Question 1: Pointing to a girl in the photograph, Ajay said, "Her mother's brother is the only son of my mother's father." How is the girl's mother related to Ajay ?
    A) Mother
    B) Sister
    C) Aunt
    D) Grandmother
    E) None of these
    Only son of Ajay's mother's father -- Ajay's maternal uncle.
    So, the girl's maternal uncle is Ajay's maternal uncle.
    Thus, the girl's mother is Ajay's aunt.
    Question 2: 
    1. A + B means A is the brother of B
    2. A × B means A is the father of B
    3. A ÷ B means A is the mother of B

    Which of the following would mean "G is the son of H"?
    A) H × I × G
    B) H + G × I
    C) H ÷ G ÷ I
    D) H × G + I

    Solution: Answer: Option D
    Go by options. In fourth option, our diagram will be like

    We don't know the gender of I. So. We will not put any symbol on its side.
    Now that you have understood the topic well and solved the above examples, you are ready to take the test on relations.


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