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Question

In a family of five members, P is Q's sister and R is Q's mother. S is R's father and T is S's mother. How is P related to S ?

The correct answer is

Grand-daughter

Solving the Blood Relation Puzzle

This question asks us to figure out the relationship between two individuals, P and S, based on the connections given within a family of five members. Let's break down the given information step-by-step to build the family structure.

Step-by-Step Analysis of Relationships

  • P is Q's sister: This means P and Q are siblings, and P is female.
  • R is Q's mother: This tells us that R is the mother of Q. Since P is Q's sister, R is also P's mother.
  • S is R's father: This means S is the parent of R. Since R is the mother of P and Q, S is the maternal grandfather of P and Q.
  • T is S's mother: This means T is S's parent. T is the great-grandmother of P and Q.

Constructing the Family Tree

Based on the above points, we can visualize the family structure:

  • T is one generation above S.
  • S is one generation above R.
  • R is one generation above P and Q.
  • P and Q are on the same generation level.

Let's represent the generations:

  • Generation 1: T
  • Generation 2: S (son of T)
  • Generation 3: R (daughter of S)
  • Generation 4: P, Q (children of R)

Determining P's Relation to S

We need to find out how P is related to S. From our analysis:

  • P is the child of R.
  • R is the daughter of S.

Therefore, P is the child of S's daughter. A child of a daughter is called a grandchild. Since P is identified as Q's sister, P is female. Thus, P is the grand-daughter of S.

Conclusion on P's Relationship to S

Following the connections, P is the child of R, and R is the daughter of S. This makes P the grand-daughter of S.

Revision Table: Key Relationships

Let's summarise the direct links we used:

Relation Given Inference
P is Q's sister P and Q are siblings; P is female
R is Q's mother R is mother of P and Q
S is R's father S is father of R; S is grandfather of P and Q
T is S's mother T is mother of S; T is great-grandmother of P and Q

Combining the inferences, we see that P is in the generation below R, and R is in the generation below S. Specifically, P is R's daughter, and R is S's daughter. This confirms that P is S's grand-daughter.

Additional Information on Blood Relation Questions

Blood relation questions are common in reasoning sections of competitive exams. They test your ability to understand and decipher complex relationships. Here are some tips:

  • Always start by identifying the central person or the person whose relationship is being asked about.
  • Draw a diagram or a family tree. Use symbols for different genders (e.g., circle for female, square for male) and lines to show relationships (e.g., vertical for parent-child, horizontal for siblings, double horizontal for spouse).
  • Break down complex relationships into simpler steps. For example, 'father of mother' is 'maternal grandfather'.
  • Pay close attention to the gender of the individuals when determining the final relationship (e.g., grandchild can be grandson or grand-daughter).
  • Work backwards from the person whose relationship is being asked, or build the tree from the oldest generation downwards.

Practicing different types of blood relation puzzles will help you improve speed and accuracy.

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Important Questions from Family Tree Problems

  1. Saloni is the daughter of the only son of Kartik. Nirupama is the mother of Deepak. Yamini’s only son, Ankit, is married to Nirupama. Kartik is the paternal grandfather of Deepak. How is Kartik related to Ankit?

  2. P, L, T, B, N and D are six members of a business family. N is the son of B, who is not the mother of N. L is the brother of B. D and B are a married couple. T is the daughter of D, who is the sister of P. How is N related to T?

  3. Ramesh is the father of Manideep. Ramesh has only two children. Manideep is the brother of Niharika. Niharika is the daughter of Kavita. Ananya is the granddaughter of Kavita. Sujit is the father of Ananya. How is Sujit related to Manideep?

  4. P is the brother of Q. S is the father of P. R is the brother of S. If T is the mother of R, then how is P related to T?

  5. There are seven members, B, C, D, E, F, G and H, in a family. H is the only daughter-in- law of D. E is the sister of C. C is the only son of F, who is the wife of D. B and G are the sons of H. How is G related to F?

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