Blood Relations

Question Type Overview

Coded Blood Relations questions present family relationships using symbols like '+', '-', '*', '/', '@', '#', etc. Each symbol represents a specific relationship (e.g., 'P + Q' might mean 'P is the father of Q'). Your task is to decode a given expression (e.g., 'A * B - C + D') and determine the relationship between two specified individuals, or identify which expression represents a particular relationship.

Pattern Recognition Rules

• Symbol Decoding: Memorize or quickly note down what each symbol signifies. Pay close attention to the order (P is relation of Q vs. Q is relation of P).
• Gender Identification: Crucial! Some relationships directly state gender (e.g., 'father', 'daughter'). Others imply it (e.g., 'husband' implies male, 'wife' implies female). If a relationship doesn't specify gender (e.g., 'sibling', 'child'), DO NOT assume it.
• Generation Gap: Understand how each symbol affects the generation level (e.g., 'father' moves one generation up, 'son' moves one down, 'brother' stays same generation).
• Directionality: Note if the first person is related to the second, or vice-versa. (e.g., 'P + Q' means P is father of Q, not Q is father of P).

Step-by-Step Approach

Let's use an example: Given:

1. P + Q means P is the father of Q
2. P - Q means P is the wife of Q
3. P * Q means P is the brother of Q

Question: How is P related to S in the expression 'P + Q * R - S'?

1. Break Down the Expression: Analyze each segment from left to right.

   • P + Q: P is the father of Q. (P: Male, Q: Gender unknown, 1 generation below P)
   • Q * R: Q is the brother of R. (Q: Male, R: Gender unknown, same generation as Q)
   • R - S: R is the wife of S. (R: Female, S: Male, same generation as R)

2. Build a Mental (or Quick Sketch) Family Tree: Link the relationships.

   • P (Male) is father of Q (Male).
   • Q (Male) is brother of R (Female).
   • R (Female) is wife of S (Male).

3. Trace the Relationship: Now, find the link between P and S.

   • P is father of Q.
   • Q is brother of R. So, P is also father of R.
   • R is wife of S. So, P is the father of S's wife.

4. Conclude: P is the Father-in-law of S.

Time-Saving Shortcut

• Gender Check First: For 'Which expression shows X is Y's Z?' type questions, eliminate options immediately if the gender of X or Y doesn't match the required relationship. For example, if X must be female, eliminate options where X's relationship symbol makes X male or gender unknown.
• Generation Gap Analysis: Quickly count generation gaps. If 'X is Y's grandfather', there are two generation gaps. Eliminate options that only show one or three gaps. This can often narrow down choices significantly without full decoding.
• Focus on the Target: When asked for 'A to E', you don't always need to fully decode the entire chain. Sometimes, the relationship becomes clear after just a few steps. Stop when you have enough information.

Question Type Overview

Blood Relations questions in SSC CGL primarily come in three types:

1. Puzzle-based: A paragraph describes multiple relations, and you need to deduce the relationship between two specific individuals. (e.g., 'A is B's brother, C is D's mother, D is A's son...').
2. Pointing/Introducing: A person points to a photograph or another person and describes their relation to themselves. (e.g., 'Pointing to a man, a woman said, "He is the son of my father's only sister."').
3. Coded Relations: Relationships are represented by symbols (e.g., 'A+B means A is the father of B; A-B means A is the wife of B'). You then decode a given expression to find the relation. This is less common for direct relations but appears in advanced blood relation problems.

Pattern Recognition Rules

To solve these quickly and accurately, follow these rules:

• Do NOT assume gender: Names like 'Kiran' or 'Rahul' can be male or female in some regions. Only assign gender if explicitly stated (e.g., 'he', 'she', 'father', 'mother', 'brother', 'sister').
• Use Standard Symbols:
  • Male: + or □
  • Female: - or ○
  • Spouse: = (horizontal double line)
  • Siblings: -- (horizontal single line)
  • Parent-Child: | (vertical line, parent above child)
• Generational Gaps: Keep track of generations. Parents/Uncles/Aunts are one generation above; Children/Nieces/Nephews are one generation below; Grandparents are two generations above.
• Paternal vs. Maternal: Differentiate relations from the father's side (paternal) and mother's side (maternal).

Step-by-Step Approach

1. Identify the Central Person: In pointing questions, this is usually 'my' or 'I'. In puzzles, pick a person mentioned early on.
2. Break Down the Statement: For complex sentences, simplify them step-by-step, working backward from the end of the sentence towards the central person. For example, 'my father's only sister' becomes 'my aunt'.
3. Draw a Family Tree: Use the standard symbols to create a visual representation. This is the most crucial step for accuracy. Place individuals on different levels for generations and connect them with appropriate lines. Example: 'A is B's father. B is C's sister. C is D's son.'
   • Start with A(+) as B's father.
   • A(+)
   • |
   • B(-)
   • B is C's sister, so C is on the same level as B.
   • A(+)
   • |
   • B(-) -- C(gender unknown)
   • C is D's son. So D is C's parent, one level above C. D's gender is unknown.
   • A(+) -- D(gender unknown)
   • | |
   • B(-) -- C(+)
   • From this, you can deduce A is D's spouse, and D is B's mother.
4. Trace the Final Relation: Once the tree is complete, trace the path between the two individuals whose relation is asked.

Time-Saving Shortcut

For 'Pointing/Introducing' questions, always start decoding from the 'my' or 'mine' part of the statement and work backward. This simplifies the complex chain into direct relations faster. For example, 'He is the son of my father's only sister' -> 'my father's only sister' = 'my aunt' -> 'son of my aunt' = 'my cousin'.

Question Type Overview

Blood Relations questions primarily fall into three categories:

1. Puzzle-based: A series of statements describe relationships among multiple family members. You need to deduce the relationship between two specific individuals.
2. Pointing/Introducing: A person points to or introduces another, describing their relationship indirectly. You must trace the connection from the speaker to the subject.
3. Coded Blood Relations: Relationships are represented by symbols (e.g., A+B means A is the father of B). You decode the expression to find the relationship.

Pattern Recognition Rules

To quickly build a family tree and avoid confusion, use standard symbols:

• Gender: Male (+) or Square [ ], Female (-) or Circle ( ). Never assume gender unless explicitly stated.
• Generations:
  • Parent/Child: Vertical line ( | ) with parent above child.
  • Same Generation (Siblings/Cousins): Horizontal line ( — ).
  • Spouse: Double horizontal line ( = ).
• Key Relations:
  • Father's/Mother's Father = Grandfather (Paternal/Maternal)
  • Father's/Mother's Mother = Grandmother (Paternal/Maternal)
  • Father's Brother = Paternal Uncle; Mother's Brother = Maternal Uncle
  • Father's Sister = Paternal Aunt; Mother's Sister = Maternal Aunt
  • Children of Uncle/Aunt = Cousin

Step-by-Step Approach

Follow these steps for any Blood Relations problem:

1. Identify the Central Person: Start with the person whose relation is being described or the first person mentioned in the chain.
2. Draw the Family Tree: Use the standard symbols to represent each relationship statement. Build the tree step-by-step, connecting individuals as you go.
3. Assign Gender: Mark (+) for male and (-) for female. If gender is unknown, leave it blank or use a question mark (?).
4. Simplify Complex Phrases: Break down phrases like "brother of my father's wife" into simpler terms (e.g., "my uncle").
5. Trace the Final Relation: Once the tree is complete, trace the path from the first person to the second person mentioned in the question to find the required relationship.

Example: A is B's brother. C is A's mother. D is C's father. E is B's son. How is E related to D?

• Step 1 & 2: A(+) — B(?)
• Step 2 & 3: C(-) | A(+)
• Step 2 & 3: D(+) | C(-)
• Step 2 & 3: B(?) | E(+)
• Combine: D(+) → C(-) → A(+) — B(?) → E(+)
• Step 5: D is C's father. C is A's mother. A is B's brother, so C is also B's mother. B is E's father/mother. Therefore, D is E's paternal/maternal grandfather. Since D is C's father and C is B's mother, D is E's maternal grandfather.

Time-Saving Shortcut

• Self-Reference: When dealing with pointing or complex puzzle questions, try to relate the characters to yourself or your own family members. For example, if the question says "his mother's only daughter is my mother," imagine it's your mother, and work backward. This often simplifies the mental calculation and speeds up problem-solving.

Question Type Overview

Coded Blood Relations questions present family relationships using symbols (e.g., A + B means A is the father of B). Your task is to decode these symbols and determine the relationship between two specific individuals mentioned in a given expression. These questions primarily test your ability to quickly interpret coded information, build a mental or drawn family tree, and accurately trace relationships while keeping track of gender and generation.

Pattern Recognition Rules

• Symbol-Relation Mapping: Each symbol represents a unique relationship (e.g., +, -, *, /, $, #, @). Memorize or quickly note these mappings.
• Gender Identification: Crucial for accuracy. Symbols often define gender (e.g., 'father' implies male, 'mother' implies female). Do NOT assume gender unless explicitly stated by the symbol or context.
• Generation Gaps: Understand how each symbol affects the generation level (e.g., parent/child is one generation gap, sibling is same generation).
• Direction of Relation: Pay attention to which person is related to whom (e.g., 'A is father of B' is different from 'B is father of A').

Step-by-Step Approach

Let's use the example: If A + B means A is the father of B, A - B means A is the wife of B, and A × B means A is the brother of B, then what does P + Q - R mean?

1. List Symbols & Meanings:

   • • : Father
   • • : Wife
   • × : Brother

2. Break Down the Expression: P + Q - R

   • First part: P + Q
   • Second part: Q - R

3. Build the Family Tree Segment by Segment:

   • P + Q: P is the father of Q. This means P is male (+), and Q's gender is currently unknown.
     • Diagram: P(+) → Q(?)
   • Q - R: Q is the wife of R. This means Q is female (-) and R is male (+).
     • Diagram: Q(-) ↔ R(+)

4. Combine and Trace: Now combine the segments:

   • P(+) → Q(-)
   • Q(-) ↔ R(+)
   • So, P is the father of Q, and Q is the wife of R. This implies R is P's son-in-law.

5. State the Relation: P is the father-in-law of R.

Time-Saving Shortcut

• Gender Elimination: As soon as you determine the gender of the target person, eliminate options that contradict it. For example, if you find the person is male, options like 'mother', 'aunt', 'sister' can be immediately discarded.
• Generation Gap Check: Quickly assess the generation gap. If the relation involves a parent/child, the gap is one generation. If it's a grandparent/grandchild, it's two generations. This helps eliminate options that are too high or too low in the family hierarchy.
• Focus on the 'Who to Whom': Always re-read the question to ensure you are finding the relation of the first person to the second person, not vice-versa. A common mistake is reversing the relationship.
• Minimal Diagramming: Avoid elaborate drawings. Use simple arrows and +/- for gender. For example, P(+) → Q(-) ↔ R(+).

This is a map of the family structure. You place the oldest members at the top. This includes grandfathers and grandmothers. Parents, uncles, and aunts go in the middle row. Children, nephews, and nieces go in the bottom row. This helps you see the 'generation gap' easily. For example, if A is the father of B, A is one level above B.

In this type, symbols represent relationships. For example, 'A @ B' might mean A is the sister of B. You must decode the symbols one by one. Always start from the left side and build the tree. For example, if P + Q means P is the mother, and Q - R means Q is the brother, then P is the mother of R's brother.

These are indirect questions. A person points to a photo and describes a relation. To solve this, start from the last relation mentioned. For example, 'My father's only son' is simply 'Me' (if the speaker is male). Breaking the sentence into small parts makes it very easy to solve.