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Blood Relation Puzzle

Introduction

Blood Relation puzzles में दिए गए परिवारिक संबंधों को family tree में बदलकर ऐसे प्रश्नों का उत्तर देना होता है - “X, Y का क्या लगता है?” ये puzzles relation chains (father/mother, son/daughter, husband/wife, brother/sister आदि) को पढ़कर उन्हें directional links में बदलने का अभ्यास करवाते हैं।

यह pattern competitive exams (SBI PO, IBPS, SSC, CAT) में बहुत पूछा जाता है क्योंकि यह logical chaining और gender व generation cues की careful reading को test करता है।

Pattern: Blood Relation Puzzle

Pattern

हर relation statement को family tree में एक node-link में बदलें और step-by-step link follow करके required relation निकालें।

  • Direction: Parent → Child (father/mother → son/daughter) एक generation नीचे ले जाता है; spouse links same generation में रहते हैं।
  • Gender matters: “son”, “daughter”, “husband”, “wife”, “mother”, “father” जैसे शब्द gender साफ बताते हैं - इनसे “son-in-law” vs “daughter-in-law” जैसी options तय होती हैं।
  • Siblings: Brothers/sisters के same parents होते हैं - sibling clues से दोनों को एक ही parent pair से जोड़ें।
  • Combine clues: छोटा tree (या linear chain) बनाकर clue merge करें और फिर relation read करें।

Step-by-Step Example

Question

P, Q का father है। Q, R की mother है। R, S का brother है। S, T की daughter है (T male है)। T, P का क्या लगता है?

Options:
A) Father-in-law    B) Son-in-law    C) Uncle    D) Grandfather

Solution

  1. Step 1: Translate P → Q

    P, Q का father है → Q, P का child है (generation: P → Q)।

  2. Step 2: Translate Q → R

    Q, R की mother है → R, Q का child और P का grandchild है (chain: P → Q → R)।

  3. Step 3: Use sibling relation R ↔ S

    R, S का brother है → दोनों के parents Q और T होंगे। यानी S भी Q और T की child है।

  4. Step 4: Infer T’s relation to Q and P

    S, T की daughter है और Q की भी child है → T (male) = Q का spouse (husband)। Q, P की child है → Q का husband = P का son-in-law।

  5. Final Answer:

    Son-in-law → Option B

  6. Quick Check:

    Q = P का child, T = Q का husband → spouse of P’s child = son-in-law/daughter-in-law। T male है → son-in-law ✔

Quick Variations

1. Single-generation chains (parent → child → grandchild) जहाँ gender unclear हो - neutral terms या gender clues का उपयोग करें।

2. Sibling + spouse combinations (“A is brother of B; C is wife of B”) - sibling और spouse links को carefully merge करें।

3. In-law relations (“X is son of Y; Z is husband of X”) - spouse mapping से in-law relations निकालें।

4. Multi-generation puzzles (grandfather/great-grandmother) - chain को generation-by-generation follow करें।

Trick to Always Use

  • Step 1: Parent → child links (P → Q) arrow से mark करें, spouse links (Q - T) horizontal line से दिखाएँ।
  • Step 2: Gender clues ध्यान से mark करें - ये in-law ambiguity तुरंत remove करते हैं।
  • Step 3: Question को reduce करें: “दो nodes का shortest path क्या है?” - generation steps और spouse moves गिनकर relation नाम दें।

Summary

Summary

  • हर sentence को parent → child या spouse ↔ spouse link में convert करके clues combine करें।
  • Gender clues हमेशा mark करें - इससे in-law type (son-in-law/daughter-in-law) स्पष्ट होता है।
  • Siblings के same parents होते हैं - इससे लोगों को एक ही parent node के नीचे place करने में मदद मिलती है।
  • Relation ढूँढने के लिए family graph में shortest path trace करें और generation + spouse moves से relation निर्धारित करें।

याद रखने योग्य उदाहरण:
यदि Q आपकी child है और T, Q का male spouse है → T आपका son-in-law होगा।

Practice

(1/5)
1. A is the brother of B. C is the father of A. D is the mother of B. How is C related to D?
easy
A. Brother
B. Husband
C. Father
D. Son

Solution

  1. Step 1: Identify family links

    A and B are siblings (same parents).

  2. Step 2: Parental relationship

    C is father of A (and B). D is mother of B (and A).

  3. Step 3: Relation between C and D

    Since C is father and D is mother of the same children → they are spouses.

  4. Final Answer:

    Husband → Option B

  5. Quick Check:

    Father + Mother of same kids → husband and wife ✅
Hint: If both parents are given for same children → father ↔ mother implies husband-wife relationship.
Common Mistakes: Assuming father-son relation instead of husband-wife.
2. P is the son of Q. Q is the daughter of R. R is the father of S. How is S related to P?
easy
A. Aunt
B. Mother
C. Sister
D. Grandmother

Solution

  1. Step 1: Link R → Q

    R is the father of Q → Q is R’s daughter.

  2. Step 2: Link Q → P

    Q is the mother of P → P is Q’s son.

  3. Step 3: Relation of S

    R is also the father of S → Q and S are siblings → S is the sibling of P’s parent → S is P’s aunt (or uncle if male). Given options, the correct relation is aunt.

  4. Final Answer:

    Aunt → Option A

  5. Quick Check:

    R → (Q,S) → Q parent of P → sibling of parent = aunt/uncle ✅
Hint: Two children of the same parent are siblings - siblings of a parent are aunts/uncles to the child.
Common Mistakes: Confusing generation levels; S is same generation as Q, not parent/grandparent to P.
3. R is the mother of S. S is the father of T. T is the brother of U. How is R related to U?
medium
A. Mother
B. Aunt
C. Grandmother
D. Sister

Solution

  1. Step 1: Build family chain

    R is the mother of S → R → S.

  2. Step 2: Next generation

    S is the father of T → S → T.

  3. Step 3: Add sibling

    T and U are brothers → they share the same parents (S and spouse).

  4. Step 4: Find relation

    R is the parent of S (one generation above), and S is parent of U → R is the grandmother of U.

  5. Final Answer:

    Grandmother → Option C

  6. Quick Check:

    R → S → U (two-generation gap) → grandmother ✅
Hint: Count generational steps: two downward links = grandparent relation.
Common Mistakes: Stopping one generation early and calling 'mother' instead of 'grandmother'.
4. A’s father is B’s brother. B’s mother is C’s wife. How is C related to A?
medium
A. Uncle
B. Brother
C. Father
D. Grandfather

Solution

  1. Step 1: Decode A’s father

    A’s father is B’s brother → A’s father and B are siblings → share the same parents.

  2. Step 2: Decode B’s mother

    B’s mother is C’s wife → C is the husband of B’s mother → C is the father of B (and B’s brother, A’s father).

  3. Step 3: Relation of C to A

    C is father of A’s father → thus C is A’s grandfather.

  4. Final Answer:

    Grandfather → Option D

  5. Quick Check:

    C → B (child) → A (grandchild) ✅
Hint: Trace through parents of siblings - the shared parent becomes a grandparent for the next generation.
Common Mistakes: Mixing up who is brother or father - always move one generation at a time.
5. M is married to N. N is the sister of O. O’s mother is P. How is P related to M?
medium
A. Mother-in-law
B. Sister
C. Aunt
D. Grandmother

Solution

  1. Step 1: Identify marriage

    M married to N → N is M’s spouse.

  2. Step 2: Use sibling relation

    N and O are siblings → share parents.

  3. Step 3: Parent relation

    P is O’s mother → also N’s mother (since O and N are siblings).

  4. Step 4: Find relation of P to M

    P is the mother of M’s spouse (N) → thus M’s mother-in-law.

  5. Final Answer:

    Mother-in-law → Option A

  6. Quick Check:

    Parent of spouse = in-law ✅
Hint: Whenever you see 'spouse’s parent' → it’s an in-law relationship.
Common Mistakes: Incorrectly labeling P as mother instead of mother-in-law.

Mock Test

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