Blood Relations Chapter Notes | Quantitative Aptitude for CA Foundation PDF Download

Introduction

For example:
1.. child is related to their parents by blood, as they share genetic material inherited from them. 
2. Siblings are related by blood as they share the same biological parents. 

 Blood relations form the foundation of family structures and lineage, and they are often recognized legally in matters such as inheritance and custody. 

Blood Relations: Paternal Side

1. Paternal Grandparents:

•  Father’s father is called Grandfather. 
•  Father’s mother is called Grandmother. 

2. Paternal Uncle and Aunt:

•  Father’s brother is called Uncle. 
•  Father’s sister is called Aunt. 

3. Cousins:

•  Children of your uncle are your Cousins. 
•  Wife of your uncle is your Aunt. 
•  Children of your aunt are also your Cousins. 
•  Husband of your aunt is your Uncle. 

Blood Relations: Maternal Side

1. Maternal Grandparents:

•  Mother’s father is called Maternal Grandfather. 
•  Mother’s mother is called Maternal Grandmother.

2. Maternal Uncle and Aunt:

•  Mother’s brother is called Maternal Uncle. 
•  Mother’s sister is called Aunt. 

3. Maternal Cousins:

•  Children of your maternal uncle are your Cousins. 
•  Wife of your maternal uncle is your Maternal Aunty. 

Relations

Blood Relations

 The efficiency in solving blood relation problems relies on having a clear understanding of the various blood relations. Here are some key relationships: 

(a) Brother: My mother's or father's son is my brother. 
(b) Sister: My mother's or father's daughter is my sister. 
(c) Grandfather: My mother's or father's father is my grandfather. 
(d) Aunt: My mother's or father's sister is my aunt. 
(e) Uncle: My mother's or father's brother is my uncle. 
(f) Daughter-in-law: My son's wife is my daughter-in-law. 
(g) Son-in-law: My daughter's husband is my son-in-law. 
(h) Nephew: My brother's son is my nephew. 
(i) Niece: My brother's daughter is my niece. 
(j) Brother-in-law: My sister's husband is my brother-in-law. 
(k) Sister-in-law: My brother's wife is my sister-in-law. 
(l) Sister-in-law: My husband's or wife's sister is my sister-in-law. 
(m) Brother-in-law: My husband's or wife's brother is my brother-in-law. 
(n) Cousin: My uncle's or aunt's son or daughter is my cousin. 
(o) Father-in-law: My wife's father or husband's father is my father-in-law. 
(p) Mother-in-law: My wife's mother or husband's mother is my mother-in-law. 
(q) Mother: My father's wife is my mother. 
(r) Father: My mother’s husband is my father. 
(s) Grandson: My son’s or daughter’s son is my grandson. 
(t) Granddaughter: My son’s or daughter’s daughter is my granddaughter. 

Different Types of Questions with Explanation 

Explanation: A is the daughter of B. B is the mother of C. D is the brother of C. Therefore, D is the son of B, which makes D the brother of A. 

(2) P is Q’s brother. R is Q’s mother. S is R’s father. T is S’s mother. How is P related to T? 
(a) Grand-daughter 
(b) Great grandson 
(c) Grandson 
(d) Grandmother 

Explanation:. P is the brother of Q, which means P is male. R is the mother of P and Q, and R is the daughter of S. This makes S the grandfather of P. Since S is the son of T, T is the great-grandmother of P. Therefore, P is the great-grandson of T. 

(3) A is B’s brother. C is D’s father. E is B’s mother. A and D are brothers. How is E related to C? 
(a) Sister 
(b) Sister-in-law 
(c) Niece 
(d) Wife 

Explanation:. A is the brother of B, which means A is male. C is the father of D, so C is also male. E is the mother of B, making E female. A and D are brothers, which means D is male as well. 

Deductions

(i) A and D are brothers of D 
(ii) C is the father of A, B and D 
(iii) C is the mother of A, B and D 
Thus, E is wife of C 

4. A is the sister of B. B is the brother of C. C is the son of D. How is D related to A? 
(a) Mother 
(b) Daughter 
(c) Son 
(d) Uncle 

Explanation: (1) B is brother of C (2) C is son of D. (3) A is the sister of B and C. A is the daughter of 'D'. 
According to the options given, we are left with no choice. But selection option (a) is correct. 

5. B is the brother of A. whose only sister is mother of C. D is maternal grandmother of C. How is A related to D? 

(a) Daughter-in-law 
(b) Daughter 
(c) Aunt 
(d) Nephew 

Explanation: Although sex of A is not mentioned clearly in the question. On the basis of information given is A is daughter of D. 

6. A and B are sisters. R and S are brothers. A's daughter is R's sister. What is B's relation to S? 
(a) Mother 
(b) Grandmother 
(c) Sister 
(d) Aunt 

Explanation: A's daughter is the sister of R and S. B is sister of A. B is aunt of S. 

7. E is the sister of B. A is the father of C. B is the son of C. How is A related to E? 
(a) Grandfather 
(b) Grand-daughter 
(c) Father 
(d) Great-grandfather 

Explanation: B' is the son of C and Grandson of A. E is sister of B. Therefore, A is Grandfather of E. 

8. Given that: A is the mother of B. C is the son of A. D is the brother of E. E is the daughter of B. Who is grandmother of D? 
(a) A 
(b) B 
(c) C 
(d) D 

Explanation: E is the daughter of B and D is brother of E. Therefore D is son B and A is son of A and A is mother of B. C is son of A and A is mother of B. Thus A, is Grandmother of D. Therefore, D is son of B. 

9. A is D' brother. D is B's father. B and C are sisters. How is A related to C? 
(a) Son 
(b) Grandson 
(c) Father 
(d) Uncle 

Explanation: B and C daughters of D . A is brother of D . Therefore A is uncle of C. 

10. A is B's sister, C is B's mother, D is C's father, E is D's mother, then how A is related to D? 
(a) Grandfather 
(b) Daughter 
(c) Grandmother 
(d) Granddaughter 

Explanation: D is the Father of C and C is the Mother of A and B.

11. (i) F is the brother of A. (ii) C is the daughter of A. (iii) K is the sister of F. (iv) G is the brother of C. Who is the uncle of G? 
(a) A 
(b) C 
(c) K
(d) F 

Explanation: G is son of A and F is brother of A. Hence, F is uncle of G. 

12. A is father of C and D is son of B. E is brother of A. If C is sister of D how is B related to E? 
(a) Sister-in-law 
(b) Sister 
(c) Brother 
(d) Brother-in-law 

Explanation: C and D are Children of A and B. B is mother of C and D. Therefore, B is Sister-in-law of E. 

13. C is wife of B. E is the son of C, A is the brother of B and father of D. What is the relationship of E to D? 
(a) Mother 
(b) Sister 
(c) Brother 
(d) Cousin 

Explanation: E is son of B and C. A is uncle of E and Father of D. Therefore E is cousin of D. 

14. M is the son of P. Q is the grand-daughter of O, who is the husband of P. How is M related to O? 
(a) Son 
(b) Daughter 
(c) Mother 
(d) Father 

Explanation: O is the Husband of P. M is the son of P. Therefore, M is son of O. 

15. X and Y are brothers. R is the father of Y. S is the brother of T and maternal uncle of X. What is T to R? 
(a) Mother 
(b) Wife
(c) Sister 
(d) Brother 

Explanation: R is the Father of X and Y. S is the maternal uncle of X and Y. Considering the option (b), T is wife of R.