BLOOD RELATIONS — COMPLETE GUIDE FOR SSC CGL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
CORE CONCEPT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Blood Relations questions test your ability to find the relationship between two people based on given clues. You are given a chain of relations and asked to find what Person A is to Person B. The key skill is reading carefully and drawing a family tree. Think of it like building a family chart step by step. Every clue adds one more person to your chart.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ KEY RULES TO REMEMBER
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Rule 1 — Always identify GENDER first. Words like son, father, brother, husband = MALE. Daughter, mother, sister, wife = FEMALE.
Rule 2 — Draw a diagram. Never try to solve in your head. A simple box-and-line chart saves time and prevents errors. Rule 3 — Watch for phrases like 'only child', 'only son', 'only daughter'. These limit how many siblings exist.
Rule 4 — Generation levels matter. Parents are one generation above. Grandparents are two generations above. Children are one below. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
CRITICAL RELATION TABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Father's or Mother's Father = Grandfather Father's or Mother's Mother = Grandmother
Father's or Mother's Brother = Uncle Father's or Mother's Sister = Aunt
Father's or Mother's Son = Brother or self Father's or Mother's Daughter = Sister or self
Son's Wife = Daughter-in-law Daughter's Husband = Son-in-law
Husband's or Wife's Brother = Brother-in-law Husband's or Wife's Sister = Sister-in-law
Brother's Son = Nephew Brother's Daughter = Niece
Sister's Son = Nephew Sister's Daughter = Niece
Uncle's or Aunt's Son or Daughter = Cousin ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
— WHAT GETS ASKED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Type 1 — Single Statement: 'A is the brother of B. B is the mother of C. How is A related to C?' (Most common type) Type 2 — Coded Relations: '+' means brother, '-' means sister, etc. Decode first, then solve. Type 3 — Pointing/Photo Questions: 'Pointing to a photo, a man says, the person in the photo is the son of my father's only son.' (Tricky — needs careful reading) Type 4 — Puzzle Based: A group of people with multiple relations given together.
Draw a full family tree. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Father's only son = Me. Mother's only daughter = Me
If the answer is Male, eliminate all female options instantly. If Female, eliminate all male options. This alone removes 2 wrong options in seconds
Count how many steps UP or DOWN the family tree you travel. Two steps up = Grandparent level. Two steps down = Grandchild level. Same level = Sibling or Cousin
Same generation + same parents = Sibling. Same generation + different parents = Cousin. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
— SINGLE CHAIN ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Question: A is the son of B. C is the daughter of A. D is the husband of B.
How is C related to D? Step 1 — Build the chain: B is a female (has a son A and a husband D). D is male (husband of B). A is male (son of B). C is female (daughter of A). Step 2 — Draw the tree: D married B → their son is A → A's daughter is C. Step 3 — Find relation: D is B's husband. B is A's mother. So D is A's father.
A's daughter is C. So D is C's GRANDFATHER. Answer: C is D's Granddaughter. OR D is C's Grandfather. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WORKED EXAMPLE 2 — PHOTO/POINTING TYPE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Question: Pointing to a photograph, Ravi says, 'She is the daughter of my grandfather's only son.' How is the girl in the photo related to Ravi? Step 1 — Decode 'my grandfather's only son': Grandfather's only son = Ravi's Father (since Ravi is male and father is the only son). Step 2 — 'Daughter of my father' = Ravi's Sister. Step 3 — Confirm gender: The girl is female.
Sister is female. Correct. Answer: The girl is Ravi's Sister. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ NUMBER 1
— THE GENDER TRAP ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Students assume gender without reading carefully. Names like 'Kiran', 'Renu', 'Jai' can be misleading. NEVER assume gender from a name.
Only assign gender when the question uses clear words like son, daughter, husband, wife, brother, sister, mother, or father. This one mistake causes most wrong answers in Blood Relations.
54graded MCQs · easy to hard · full solution & trap analysis · showing 20 of 54
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