Practice Questions: Blood Relations | Science Olympiad Class 6 PDF Download

Q1: How is P related to N in the given family tree?

(a) Father
(b) Paternal uncle
(c) Maternal uncle
(d) Son
Ans: (c)
Explanation: Option (c) is correct because M is shown as N's mother and P is the brother of M. A brother of one's mother is called a maternal uncle. The other options are incorrect given this relationship.
Q2: How many males are there in the following family tree?

(a) 3
(b) 5
(c) 1
(d) 4
Ans: (d)
Explanation: Option (d) is correct because the given pairs PT, RN, DS and ME indicate brother–sister pairs and the males in those pairs are T, R, S and M - making a total of four males. The other options do not match this count.
Q3: See the following family tree and find the total number of female members in the family.

(a) 3
(b) 1
(c) 2
(d) Can't say
Ans: (d)
Explanation: Option (d) is correct because the gender of R is not indicated in the family tree. Without knowing whether R is male or female, we cannot determine the total number of female members. Therefore, it is not possible to give a definite count.
Q4: Who is the son in law of P and I in the family tree given below?

(a) S
(b) T
(c) E
(d) N
Ans: (b)
Explanation: Option (b) is correct because D is the daughter of P (and L), and T is shown as the husband of D. The husband of one's daughter is the son‑in‑law; therefore T is the son‑in‑law of P and I. The other choices do not fit this relationship.
Q5: In the following family tree??.is the paternal grandfather D.

(a) X
(b) C
(c) D
(d) P
Ans: (d)
Explanation: Option (d) is correct because X is the son of P and D is the daughter of X. That makes P the father of X (who is D's father). The father of one's father is the paternal grandfather; hence P is D's paternal grandfather. The other options do not match this relationship.
Q6: Reena said, "The man going on the road is my mother's husband". How is the man related to Reena?
A) Brother
B) Son
C) Father
D) Uncle
Ans: (c)
Explanation: "My mother's husband" refers to Reena's father. Therefore, the man walking on the road is Reena's father. Hence option C is correct.
Q7: Pointing to a man in a photograph, Priya said, "He is the father of the brother of my sister." How is the man related to Priya?
(a) Father
(b) Uncle
(c) Brother
(d) Grandfather (maternal)
Ans: (a)
Explanation: Breakdown:

• "Brother of my sister" is Priya's brother.
• "Father of the brother" is the father of Priya's brother, which is Priya's father.

Therefore, the man in the photograph is Priya's father, so option (a) is correct.
Q8: Pointing to a girl playing in the park, Mrs. Kapoor said, "She is the daughter of my daughter." How is that girl related to Mrs. Kapoor?
(a) Daughter
(b) Sister
(c) Granddaughter
(d) Mother
Ans: (c)
Explanation: If the girl is the daughter of Mrs. Kapoor's daughter, then she is Mrs. Kapoor's granddaughter. Hence option (c) is correct.
Q9: In a family consisting of four members - A, B, C, and D, where A is the father of B, and C is the wife of A. D is the grandson in the family. How is B related to D?
(a) Grandfather
(b) Son
(c) Brother
(d) Father
Ans: (d)
Explanation: A is father of B and C is A's wife, so A and C are grandparents. D is the grandson, which means D is the son of B. Therefore, B is D's father, so option (d) is correct.
Q10: Pointing to a boy in a photograph, Rahul said, "He is the only son of my mother's husband." Here, Rahul is talking about...
(a) Himself
(b) His brother
(c) His cousin
(d) His nephew
Ans: (a)
Here, "my mother's husband" is Rahul's father. The phrase "the only son of my father's" refers to Rahul himself if he is the single son. Therefore, Rahul is pointing to himself. Hence option (a) is correct.