Pointing to Kiran, Rohan says, “She is the daughter of the only son of my grandfather.” How is Kiran related to Rohan?
Sister
Understanding Blood Relations: Solving the Kiran-Rohan Puzzle
This question is a classic example of a blood relation puzzle, where you need to deduce the relationship between two people based on a given statement. The key is to break down the statement piece by piece, starting from the end or from the perspective of the speaker (Rohan).
Analyzing Rohan's Statement
Rohan says, “She is the daughter of the only son of my grandfather.” Let's analyze this statement from Rohan's point of view:
- "My grandfather": This refers to Rohan's paternal or maternal grandfather. In blood relation problems, if not specified otherwise, "grandfather" usually refers to the paternal grandfather.
- "The only son of my grandfather": Rohan's grandfather can have one or more sons. The statement specifies "the only son." If Rohan's grandfather has only one son, that son must be Rohan's father. This is because Rohan is the grandson of his grandfather, and one of the grandfather's children must be Rohan's parent. Since it's the only son, he must be Rohan's father.
- "The daughter of the only son of my grandfather": This means the daughter of Rohan's father.
Deducing the Relationship
We have established that "the only son of my grandfather" is Rohan's father. The statement then says Kiran is the "daughter of the only son of my grandfather," which translates to Kiran being the daughter of Rohan's father.
A daughter of one's father is one's sister.
Therefore, Kiran is Rohan's sister.
Verification with Options
Let's look at the given options:
- Mother: The daughter of your father is not your mother.
- Daughter-in-law: The daughter of your father is not your daughter-in-law.
- Wife: The daughter of your father is not your wife (this would be an incestuous relationship and is not implied in such puzzles).
- Sister: The daughter of your father is indeed your sister.
The deduction aligns with the "Sister" option.
Conclusion
Based on the step-by-step analysis of Rohan's statement, Kiran is the daughter of Rohan's father. This relationship makes Kiran Rohan's sister.
| Part of Statement | Relationship to Rohan |
|---|---|
| My grandfather | Rohan's grandfather |
| The only son of my grandfather | Rohan's father |
| The daughter of the only son of my grandfather | Daughter of Rohan's father |
Therefore, Kiran is Rohan's sister.
Revision Table: Key Blood Relations
Understanding common blood relations is crucial for solving these puzzles. Here is a quick table of common terms:
| Relation | Description |
|---|---|
| Father's father | Paternal Grandfather |
| Father's mother | Paternal Grandmother |
| Mother's father | Maternal Grandfather |
| Mother's mother | Maternal Grandmother |
| Father's son | Brother (if you are male), Brother or Self (if you are female) |
| Father's daughter | Sister (if you are female), Sister or Self (if you are male) |
| Only son of father | Yourself (if male), Brother (if female) |
| Only daughter of father | Yourself (if female), Sister (if male) |
Additional Information: Tips for Solving Blood Relation Puzzles
Blood relation questions test your ability to understand and interpret relationships within a family structure. Here are some tips:
- Draw a Family Tree: For complex problems, drawing a diagram with generations can help visualize relationships.
- Start from the Speaker/Subject: Often, it's easiest to start from the person speaking ("my...") or the main subject of the sentence.
- Break Down Compound Relations: Break phrases like "father of my father's only son" into smaller steps.
- Pay Attention to "Only": Words like "only" significantly narrow down possibilities. "Only son" means there are no other sons.
- Assume Standard Family Structures: Unless specified, assume standard relationships (e.g., a person has two parents, siblings are children of the same parents).
Practicing various types of blood relation questions will improve your speed and accuracy in solving them.
Important Questions from General Blood Relation Problems
A man said to a lady, "your mother's husband's sister is my Aunt". How is lady related to the man?
Sadhana introduces Ramu as “The son of the brother of her father’s wife”. How is Ramu related to Sadhana?
Preeti is Harish's only daughter. Lakhan is Birendra's only son. Lakhan's sister Neeti is married to Manas. Preeti has only one brother, Manas. How is Manas related to Birendra?
Introducing Asha to guests, Bhaskar said, "her father is the only son of my father". How is Asha related to Bhaskar?
A is father of B. B is sister of C. C is sister of D. D is the son of E. How many women are there?
