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Question

If X's mother is the only daughter of Y's father, then Y's husband's sister is X's _________.

This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is Aunt

Understanding the Blood Relation Puzzle

Blood relation questions test your ability to decipher the relationships between different individuals based on a given set of information. These questions often involve building a small family tree or tracing connections step-by-step.

Analysing the Given Statement

The core statement provided is: "If X's mother is the only daughter of Y's father". Let's break this down:

  • Consider Y's father.
  • Y's father has an "only daughter". This means Y's father has only one female child.
  • This "only daughter" of Y's father is identified as X's mother.

If Y is a child of Y's father, and Y's father has only one daughter, then Y must be that only daughter. Therefore, Y is the only daughter of Y's father.

Combining this with the statement, we find that X's mother is Y.

Establishing Key Relationships

From the analysis above, we have determined a crucial relationship:

Relationship 1: Y is X's mother.

Tracing the Final Relationship

The question asks for the relationship of "Y's husband's sister" to X.

  • We know Y is X's mother.
  • Therefore, Y's husband is X's father.
  • Now consider Y's husband's sister. This is X's father's sister.

Let's summarise these steps in a table for clarity:

Individual(s) Relationship to X Reasoning
Y Mother Y is the only daughter of Y's father, and X's mother is the only daughter of Y's father.
Y's Husband Father Y is X's mother, so her husband is X's father.
Y's Husband's Sister Father's Sister (Aunt) The sister of X's father is X's Aunt.

Conclusion

Based on the step-by-step analysis of the blood relations, Y's husband's sister is the sister of X's father. The sister of one's father is their Aunt.

Therefore, Y's husband's sister is X's Aunt.

Revision Table: Key Blood Relation Terms

Here is a quick reference for common blood relations:

  • Father's sister: Aunt
  • Mother's sister: Aunt
  • Father's brother: Uncle
  • Mother's brother: Uncle
  • Sister's son: Nephew
  • Sister's daughter: Niece
  • Brother's son: Nephew
  • Brother's daughter: Niece
  • Grandfather's only daughter: Mother (if grandfather is paternal) or Aunt (if grandfather is maternal, unless he has no sons) - context is key.

Additional Information on Blood Relation Puzzles

Solving blood relation problems efficiently often involves drawing a simple family tree or using symbolic representations. For example, you can use arrows to indicate relationships or use symbols for gender.

Common patterns include tracing relations through "only child", "only daughter", "only son" clauses, which simplify the family structure considerably. Always break down complex statements into smaller, manageable parts.

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Similar Questions

  1. If Mr. X has two sisters, Y and Z, and W’s mother is the sister of Y’s father, then W’s mother is X’s _______.

  2. If X’s mother is the only daughter of Y’s father, then Y’s brother in law is X’s______

  3. If P is the brother of the son of Q’s Son, how is P related to Q?

  4. Amit and Ritu are a couple. Mrinal and Shonal are brothers. Mrinal is the brother of Ritu.

    How is Shonal related to Amit?
  5. If V is the brother of U, U is the sister of W and X is the husband of U, then W is V’s ______ .

  6. If V is the brother of U, U is the sister of W and X is the husband of U, then U is V’s______.


Important Questions from Family Tree Problems

  1. Six members of a family namely A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B. A and C are married couple. E is the brother of C, D is the daughter of A. F is the brother of B. How many male members are there in the family?
  2. Sunil is the son of Kesav. Simran, who is Kesav's sister, has a son Maruti and daughter Sita. Prem is the maternal uncle of Maruti. How is Sunil related to Maruti?
  3. A and B are brothers. C and D are sisters. A's son is D's brother. How is B related to C?

  4. A is B's sister. C is B's mother. D is C's father. E is D's mother. Then, how is A related to D?

  5. Shanti’s daughter Chandini is married to Abhi. Anchal is married to Sandy, the grandson of Shanti. Abhi's grandson is Karan. Rashmi is the mother of Karan. Shaurya is Anchal's son. How is Shaurya related to Karan?

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