What Blood Relations Questions Test
- Statement-based relation chains
- Coded relations (A + B means A is mother of B)
- Family-tree puzzles with multiple generations
- Pointing-to-photograph problems
Question bank coverage by sub-pattern
How Blood Relations Appears in RRB NTPC
Blood Relations is part of the General Intelligence & Reasoning section (30% of the RRB NTPC syllabus).
Blood Relations Solved Examples for RRB NTPC
12 exam-pattern blood relations questions from the practice bank, each with a full solution.
Pointing to a lady, Mohan said, 'She is the sister of the father of my mother's son.' How is the lady related to Mohan?
- A.Mother
- B.AuntCorrect
- C.Sister
- D.Grandmother
Solution
Mohan's mother's son = Mohan himself (or his brother). Father of Mohan = Mohan's father. Sister of Mohan's father = Mohan's paternal aunt (Bua/Aunt). Hence, the lady is Mohan's Aunt.
X is Y's sister's husband. Z is X's mother. W is Z's father. If Y walks 15 km towards West, then turns to his right and walks 10 km, then turns to his right and walks 15 km, then in which direction is he from his starting point?
- A.NorthCorrect
- B.South
- C.East
- D.West
Solution
The blood relation details are extra information. Y walks 15 km West, 10 km North, and 15 km East. The West and East movements cancel out, leaving him 10 km North from his starting point. Therefore, he is in the North direction.
Introducing a man, a woman said, 'His mother is the only daughter of my mother.' How is the man related to the woman?
- A.SonCorrect
- B.Brother
- C.Nephew
- D.Uncle
Solution
The only daughter of the woman's mother is the woman herself. So the man's mother is the woman. Therefore, the man is the woman's Son.
P is the father of Q and R is the son of S. T is the brother of P. If Q is the sister of R, how is S related to T?
- A.Wife
- B.SisterCorrect
- C.Daughter
- D.Brother-in-law
Solution
P is the father of Q, and Q is the sister of R, so P is also the father of R. R is the son of S, so S is the mother of R. T is the brother of P, so S is the sister of T.
A + B means A is the son of B, A - B means A is the wife of B. If P - Q + R, which of the following is true?
- A.R is the father of PCorrect
- B.R is the mother of P
- C.P is the daughter of R
- D.P is the son of R
Solution
P - Q means P is the wife of Q. Q + R means Q is the son of R. Therefore, P is the wife of Q, and Q is the son of R. Hence, R is the father of Q, and Q is the husband of P. Therefore R is the father of P.
X is the brother of Y. Y is the daughter of Z. P is the father of Z. How is Y related to P?
- A.GranddaughterCorrect
- B.Daughter
- C.Sister
- D.Aunt
Solution
X is the brother of Y, so they are siblings. Y is the daughter of Z, and P is the father of Z. Therefore, Z is the child of P, and Y is the grandchild of P. Since Y is female, Y is the granddaughter of P.
Eight people – A, B, C, D, E, F, G, and H – are sitting around a circular table facing the center. A is the father of G. E is the mother of H. C sits third to the left of E. B sits opposite to A. D sits second to the right of B. G is not an immediate neighbor of E. H is the daughter of G. F is the brother of A. Who is the mother of G?
- A.Cannot be determinedCorrect
- B.B
- C.C
- D.D
Solution
Based on the information provided, we know A is the father of G and B sits opposite to A. We don't have any direct information about who the mother of G is. Therefore, the answer is 'Cannot be determined'.
X and Y are siblings. A is the father of X. S is the mother of A. T is the father of S. How is X related to T?
- A.Grandson or GranddaughterCorrect
- B.Son
- C.Daughter
- D.Great Grandson or Great Granddaughter
Solution
X and Y are siblings, so they have the same parents. A is the father of X, making A the father of Y as well. S is the mother of A, making S the grandmother of X and Y. T is the father of S, making T the great-grandfather of X and Y. Therefore, X is either the grandson or granddaughter of S.
Looking at the portrait of a man, Hari said, 'His mother is the wife of my father's son. I have no brothers or sisters.' Whose portrait was Hari looking at?
- A.His sonCorrect
- B.His cousin
- C.His nephew
- D.His father
Solution
Hari has no brothers or sisters. So 'my father's son' = Hari himself. The wife of Hari = Hari's wife. The mother of the man in the portrait = Hari's wife. So the man in the portrait is Hari's son.
A is the son of B. C, B's sister, has a son D and a daughter E. F is the maternal uncle of D. How is A related to D?
- A.Brother
- B.Nephew
- C.CousinCorrect
- D.Uncle
Solution
A is the son of B. C is B's sister, which makes C the aunt of A. D is the son of C. Therefore, A and D are cousins.
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?
- A.Grandson
- B.Great-GrandsonCorrect
- C.Granddaughter
- D.Great-Granddaughter
Solution
A is B's brother, C is A's mother, therefore C is also B's mother. D is C's father, which means D is the grandfather of B. E is B's son, so E is the great-grandson of D.
Given the family relationships: P is the father of Q. Q is the son of R. R is the mother of S. T is the son of P. Which of the following statements is definitely true?
- A.Q and T are brothersCorrect
- B.R is the daughter of P
- C.S is the granddaughter of P
- D.T is the brother-in-law of R
Solution
P is the father of Q, Q is the son of R, meaning P and R are the parents of Q. R is the mother of S, which means S and Q are siblings. T is the son of P. Therefore, Q and T are brothers. All other options cannot be definitively determined from the given information.
Blood Relations — Frequently Asked Questions
What is the standard method for blood relation questions?
Draw a family tree as you read — squares for males, circles for females, vertical lines for generations. Solving in your head fails exactly when the question is worth solving.
What is the most common trap in these questions?
Assuming gender. "Child of", "sibling of" and names do not reveal gender — if the final relationship depends on an unknown gender, the answer is "cannot be determined".
How many Blood Relations practice questions does Parikshala have for RRB NTPC?
73 exam-pattern Blood Relations questions for RRB NTPC Reasoning, each with a step-by-step solution. Practice is free — no sign-up needed to start.