Login
OR
Don't worry. We'll fix this for you!
Blood Relations is a high-scoring topic in SSC CGL Reasoning — typically 1–2 questions per exam. The concept is simple once you have a systematic approach: draw a family tree, assign generation levels, and map every given clue. This guide explains the concept from scratch, gives you a complete relationship chart, two fully solved examples, shortcut tricks, and 10 practice MCQs to test your understanding.
Blood Relation questions describe family relationships and ask you to identify the relationship between two specific people. The three main question formats are: single-statement, coded chain (pointing/introductions), and multi-clue puzzle sets.
The most reliable approach is to draw a simple family tree as you read each clue. Use + for Male and – for Female. A horizontal line between two people means married couple; a vertical line downward means parent–child.
Q1. A is the mother of B. B is the sister of C. C is the father of D. How is A related to D?
A is mother of B. B is sister of C, so C is also A's child. C is father of D. So A is the grandmother of D.
Q2. Pointing to a man, a woman said, "His mother is the only daughter of my mother." How is the woman related to the man?
The woman's mother's only daughter = the woman herself. So the man's mother is the woman. The woman is the man's mother.
Q3. If P is the brother of Q, Q is the sister of R, and R is the father of S, how is P related to S?
P is sibling of Q and R (same family). R is father of S. P, as R's brother, is S's uncle.
Q4. Introducing Geeta, Mona said, "Her father is the only son of my grandfather." How is Geeta related to Mona?
My grandfather's only son = Mona's father. Geeta's father = Mona's father. They share the same father, making them sisters.
Q5. A's father's sister's son is B. B's mother is C. How is C related to A?
A's father's sister = A's aunt. A's aunt's son = B. B's mother = A's aunt. So C is A's aunt.
Q6. P is the son of Q. Q is the daughter of R. R is the husband of S. How is S related to P?
Q is P's mother. R is Q's father (P's grandfather). S is R's wife (P's grandmother).
Q7. A man said to a lady, "Your mother's husband's sister is my mother." How is the man related to the lady?
Lady's mother's husband = her father. Her father's sister = her aunt. The man's mother is that aunt. So the man is the lady's cousin (aunt's son).
Q8. Looking at a portrait, Kavya said, "He is the son of my father's only son." Who is in the portrait?
Kavya's father's only son = Kavya's brother. Kavya's brother's son = Kavya's nephew.
Q9. If X's mother is Y's mother's daughter, how is Y related to X?
Y's mother's daughter = Y's sister. X's mother is Y's sister. So Y is the sister of X's mother — making Y X's maternal aunt.
Q10. A said to B: "The father of your father is my grandfather." How is A related to B?
B's father's father = B's grandfather. A calls that same person A's grandfather. They share the same grandfather at the same generation level, making them siblings (brothers/sisters).
