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.
Based on the logical principles of Family Tree Problems, determine the valid outcome or relationship.
- A.Both Conclusion I and Conclusion II follow logically
- B.Neither Conclusion I nor Conclusion II follows
- C.Conclusion I follows logically from the given premiseCorrect
- D.Conclusion II follows logically from the given premise
Solution
In Family Tree Problems, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
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.
Based on the logical principles of Basic Blood Relations, determine the valid outcome or relationship.
- A.Conclusion I follows logically from the given premiseCorrect
- B.Conclusion II follows logically from the given premise
- C.Both Conclusion I and Conclusion II follow logically
- D.Neither Conclusion I nor Conclusion II follows
Solution
In Basic Blood Relations, analyzing the relationship between the terms verifies that Conclusion I is a direct and necessary deduction.
A family has a father, a mother, two sons, and each son has one sister (NTPC Puzzle 2). How many members are in the family?
- A.5Correct
- B.6
- C.4
- D.7
Solution
Members: Father (1) + Mother (1) + 2 Sons (2) + 1 Daughter (1, who is the sister of both sons) = 5 members.
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.
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.