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 Group D
Blood Relations is part of the General Intelligence & Reasoning section (30% of the RRB Group D syllabus).
Blood Relations Solved Examples for RRB Group D
12 exam-pattern blood relations questions from the practice bank, each with a full solution.
Pointing to a girl, Suresh said, 'She is the only daughter of the father of my sister's brother.' How is the girl related to Suresh?
- A.SisterCorrect
- B.Daughter
- C.Mother
- D.Cousin
Solution
Suresh's sister's brother = Suresh himself (or another brother). Father of Suresh = Suresh's father. Only daughter of Suresh's father = Suresh's sister. So the girl is Suresh's sister.
A is the father of C. D is the son of B. E is the brother of A. If C is the sister of D, how is B related to A?
- A.Sister
- B.Daughter
- C.WifeCorrect
- D.Brother-in-law
Solution
A is the father of C, and C is the sister of D. Therefore, A is also the father of D. D is the son of B, which means B is the mother of D. Since A is the father of D, B must be A's wife.
A is B's father. C is B's mother. D is C's brother. E is D's son. If A walks 12 km towards North, turns left and walks 5 km, then turns left and walks 3 km, and turns left again and walks 5 km, in which direction is he from his starting point?
- A.NorthCorrect
- B.South
- C.East
- D.West
Solution
A walks 12 km North, 5 km West, 3 km South, and 5 km East. The West and East movements cancel each other out. The net movement is 12 km North and 3 km South, which results in 9 km North. Therefore, A is in the North direction.
Based on the logical principles of Basic Blood Relations, determine the valid outcome or relationship.
- A.Conclusion II follows logically from the given premise
- B.Conclusion I follows logically from the given premiseCorrect
- 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.
P is the mother of K; K is the sister of D; D is the father of J. How is P related to J?
- A.GrandmotherCorrect
- B.Mother
- C.Aunt
- D.Cannot be determined
Solution
P is the mother of K, K is the sister of D, so P is also the mother of D. D is the father of J, so D is the son of P. Thus, J is the grandchild of P, making P the grandmother of J.
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.
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.
If 'A * B' means 'A is the father of B', 'A + B' means 'A is the daughter of B', 'A / B' means 'A is the mother of B', then what does 'P + Q / R * S' mean?
- A.P is the granddaughter of SCorrect
- B.P is the grandson of S
- C.P is the daughter of S
- D.P is the son of S
Solution
P + Q means P is the daughter of Q. Q / R means Q is the mother of R. R * S means R is the father of S. Thus, P is the daughter of Q, who is the mother of R, who is the father of S. Therefore, P is the granddaughter of S.
X is father of Y. Z is daughter of Y. W is brother of Z (NTPC Tree Query 2). How is X related to W?
- A.GrandfatherCorrect
- B.Father
- C.Uncle
- D.Brother
Solution
Y is the father/parent of W and Z. X is the father of Y. Therefore, X is the grandfather of W.
Given: A is the brother of B. C is the father of A. D is the brother of E. E is the daughter of B. Then, who is the uncle of D?
- A.ACorrect
- B.C
- C.B
- D.E
Solution
E is the daughter of B, and A is the brother of B. Therefore, A is the uncle of E. D is the brother of E, so A is also the uncle of D.
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.
Pointing to a photograph, a man said, 'He is the son of the only daughter of my father.' How is the man related to the person in the photograph?
- A.FatherCorrect
- B.Brother
- C.Uncle
- D.Cousin
Solution
The man's father's only daughter is the man's sister. The son of the man's sister is his nephew. Therefore, the man is the father of the person in the photograph.
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 Group D?
73 exam-pattern Blood Relations questions for RRB Group D Reasoning, each with a step-by-step solution. Practice is free — no sign-up needed to start.