Top 30 Blood Relation: Practice Set
Part I
Directions (1-3): Study the following information carefully to answer the questions that follow: A is father of B and C is mother of A. E is sister of F whose daughter is G. S, the husband of C is the grandfather of G. P is father of E and brother of R. S has only two children, both of opposite sex.
1. What is the relation between F and S?
A) F is daughter of S
B) F is sister of S
C) F is son of S
D) F is daughter in law of S
E) Either A option or D option
Option D
Explanation: C and S have 2 children, one is A who is male (A is father of B). since C is the grandfather of G so F should be wife of A to have the relation C is the grandfather of G. If F was daughter of C and s, so C would have been maternal grandfather of her daughter G.
2. What is the relation between E and B?
A) E is sister of B
B) E is brother of B
C) E is aunt of B
D) E is maternal grandmother of B
E) None of these
Option C
Explanation: E is sister of F and B is child of F
3. What is the relation between B and G?
A) B is sister of G
B) B is brother of G
C) B is aunt of G
D) There is no relation
E) None of these
Option E
Explanation: Since gender of B is not known, either sister or brother of G
Directions (4-6): A is mother of D who is father of G. B is grandfather of E and husband of A. D who has only two children is brother of C. A has two children both of same gender. J is aunt of H who is sister of G.
4. What is the relation between J and D?
A) J is sister of D
B) J is mother of D
C) J is aunt of D
D) Cannot be determined
E) None of these
Option E
Explanation: H is sister of G and G is child of D. so H and G children of D. J is aunt of H. so J can be wife of D‘s brother C or J can be sister of D‘s wife. In both cases J will be sister in law of D.
5. What is the relation between C and E?
A) C is brother of E
B) C is father of E
C) C is uncle of E
D) Cannot be determined
E) None of these
Option B
Explanation: B and A are husband wife, who have 2 children of same sex. A is mother of D who is father of G. this means both children are males. D is brother of C, so C and D both are sons of A and B. D also has two children – G and H. If B is grandfather of E then C must be father of E.
6. At least how many male members can be predicted by the given relations?
A) 2
B) 3
C) 4
D) 5
E) None of these
Option B
Explanation: B, C, and D are certainly males H and J are females. Gender of E and G not known.
Directions (7-8): A has two sons. E is the daughter of G and B is the mother of C. F, the brother of E is the son of C who is the son of A. A is grandfather of J who is not a sibling of E. B has a child named D.
7. What is the relationship between D and J?
A) D is father of J
B) D is uncle of J
C) J is son of D
D) Cannot be determined
E) None of these
Option D
Explanation: A has two sons, but it is not mentioned that A has only 2 sons. So A and B can have daughters also Also it is not known that D is son of A or daughter of A, so J can be child of D or D can be uncle/aunt of J.
8. What is the ratio of males to females in the family?
A) 1 : 1
B) 1 : 3
C) 5 : 3
D) 3 : 5
E) Cannot be determined
Option E
Explanation: J‘s and D‘s gender not known.
10. F is the Father of D, who is the father of S. M is the grandmother of R, who is the son of O.N is paternal uncle of R, who is brother of S. What is the relationship between O and R?
A) Mother and son
B) uncle and nephew
C) Father and son
D) No relation
E) Cannot be determined
Option A
Explanation: R is brother of S means D is father of R. R is son of O also, so O is mother of R.
