Blood Relation – Concepts for Aptitude

Blood Relation problems test a candidate’s ability to analyze and interpret family relationships, often involving logical deductions about family trees and lineage. Understanding blood relation terms and applying systematic reasoning will help solve these questions accurately.

Basic Terms in Blood Relations

Before diving into question-solving techniques, let’s look at some common terms:

  • Father/Mother: Direct parent of a person.
  • Son/Daughter: Direct child of a person.
  • Brother/Sister: Sibling relationships.
  • Uncle/Aunt: Sibling of one’s parent.
  • Nephew/Niece: Child of one’s sibling.
  • Grandfather/Grandmother: Parent of one’s parent.
  • Grandson/Granddaughter: Child of one’s child.
  • Cousin: Child of one’s uncle or aunt.

Approach to Solving Blood Relation Questions

  1. Analyze the Question: Start by carefully reading the statement and identifying each relationship.
  2. Break It Down: Separate each statement and understand the relationship one by one.
  3. Draw a Family Tree: For complex questions, use a family tree or diagram. This helps avoid confusion, especially in multiple-generation problems.
  4. Use Gender Symbols: If the gender is known, represent males as “M” and females as “F” to make relationships clearer.
  5. Watch for Keywords: Words like “maternal” (mother’s side) and “paternal” (father’s side) indicate the side of the family.

Let’s dive into some question types, examples, and solutions.

Types of Blood Relation Questions

  1. Direct Relationship Questions
  2. Puzzle-Based Relationship Questions
  3. Coded Relationship Questions

1. Direct Relationship Questions

In these questions, a series of relationships is given, and you need to find the connection between two individuals.

Example: Question: A is the father of B. B is the sister of C. C is the son of D. How is D related to A?

Solution:

  1. Break down each statement:
    • A is the father of B.
    • B is the sister of C.
    • C is the son of D.
  2. Analyze each relationship:
    • If A is the father of B and B is the sister of C, then A is also the father of C.
    • Since C is the son of D, D is C’s mother.
  3. Since A is the father and D is the mother of C, D is the wife of A.

Answer: D is the wife of A.

2. Puzzle-Based Relationship Questions

In these questions, multiple relationships are described, often involving several people. Creating a family tree is usually helpful.

Example: Question: In a family, there are six members P, Q, R, S, T, and U. P is the father of R but not the husband of Q. Q is the grandmother of U and is married to T. S is the daughter of T. How is R related to S?

Solution:

  1. Start with the known relationships:
    • P is the father of R but not the husband of Q, so P is married to someone else.
    • Q is the grandmother of U and is married to T.
    • S is the daughter of T, so T and Q are S’s parents.
  2. Determine family connections:
    • Since Q is the grandmother of U, S must be U’s parent.
    • R must be a sibling of S (since both are children of Q and T).
  3. Answer: R is the brother (or sibling) of S.

3. Coded Relationship Questions

In coded blood relation questions, symbols or words are used to represent relationships. You’ll need to decode the symbols first to understand the connections.

Example: Question: If ‘A + B’ means ‘A is the mother of B,’ ‘A – B’ means ‘A is the brother of B,’ and ‘A * B’ means ‘A is the husband of B,’ what does “P * Q + R” mean?

Solution:

  1. Decode each part of the statement based on the symbols:
    • P * Q means “P is the husband of Q.”
    • Q + R means “Q is the mother of R.”
  2. Analyze the entire sequence:
    • Since P is the husband of Q and Q is the mother of R, P is the father of R.
  3. Answer: P is the father of R.

Key Tips for Solving Blood Relation Problems

  1. Use a Family Tree for Visualization: Represent individuals as nodes and relationships as lines to keep track of family connections.
  2. Be Mindful of Gender: Gender-specific relationships (like “mother” vs. “father”) are critical. When the gender is not specified, make a note to avoid incorrect assumptions.
  3. Identify Generations: Group family members into generations (grandparents, parents, children) to simplify connections.
  4. Break Down Complex Statements: For lengthy descriptions, separate each relationship and resolve them step-by-step.

Practice Questions

  1. Direct Relationship: B is the son of A. C is the daughter of B. D is the husband of A. How is C related to D?
  2. Puzzle-Based: A family has seven members: P, Q, R, S, T, U, and V. P and Q are married, and P is the father of T. Q is the mother-in-law of R. R is married to S. How is T related to R?
  3. Coded Relationship: In a code, “A @ B” means “A is the sister of B,” “A # B” means “A is the father of B,” and “A $ B” means “A is the daughter of B.” What does “X # Y $ Z” mean?

Solutions to Practice Questions

  1. Answer: C is the granddaughter of D (since D is A’s husband, and B is their son, C is thus D’s granddaughter).
  2. Answer: T is the son of R (since P and Q are married, and P is T’s father, T is R’s son by marriage).
  3. Answer: X is the father of Y, and Y is the daughter of Z, so X is Z’s son-in-law.

Coding Decoding – Concepts for Aptitude

Read concepts and formulas for: Coding Decoding

Refer Aptitude Questions with Solutions on Blood Relations: https://www.learntheta.com/aptitude-questions-blood-relations/

Practice Aptitude Questions on Blood Relations with LearnTheta’s AI Practice Platform: https://www.learntheta.com/placement-aptitude/

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