BLOOD RELATIONS Cousin → Mother’s or father’s brothers or sister’s son or daughter Or Parents’ siblings’ son or daughter (or) Uncle’s or aunt’s son or daughter. Nephew → Brother’s or sister’s son. Niece → Brother’s or sister’s daughter. Uncle → Father’s or mother’s brother. Aunt → Father’s or mother’s sister. Father – in – law → Spouse’s father (or) wife’s or husband’s father. Mother – in – law → Spouse’s mother (or) wife’s or husband’s mother. Son – in – law → Daughter’s husband. Daughter – in – law → Son’s wife. Brother – in – law → Spouse’s brother (or) Sister’s husband. Sister – in – law → Spouse’s sister (or) Brother’s wife. Maternal = of or related to mother. Paternal = of or related to father. Siblings = brothers or sisters. Spouse = husband or wife. Note : Cousin is a common gender. There are no such words cousin brother and cousin sister. Generations - Persons or relations -2 generation - Grand father and grand mother ( maternal & paternal ). -1 generation - Mother, father, uncle& aunt (maternal & paternal ), father-in-law, mother-in-law.. 0 generation - I, spouse, brother, sister, brother-in-law, sister-in-law, cousin. +1 generation - son, daughter, son-in-law, daughter-in-law, nephew, niece. +2 generation - grand sons and grand daughters.
Important points to remember : 1) If the question is “how is A related to B”, we must know the gender of A to answer this question. Without knowing A’s gender, we can not determine the relation from A to B. 2) If a person is uncle or aunt to ‘A’, A is that person’s nephew ( if A is a male) or niece (if A is a female) 3) Cousin is a common gender. Example : A says to B, “ you are the son of my grand father’s only son”. Q 1) How is B related to A? Q 2) How is A related to B? Explanation : A 1) B is brother to A. My grand father’s only son = A’s father ( grand father’s only son means only one son…no other son and no daughter also) A 2) A is either brother or sister to B. A and B are siblings. B is brother to A as we know the gender of B. But we do not know the gender of A. Some of the previous questions 1) The mother of Sukesh is the only daughter of Saritha’s father. How Saritha is related to Sukesh? a) Sister b) Mother c) Aunt d) Data inadequate e) None of these Answer : b) Mother. Explanation : Only daughter of Saritha’s father = Saritha only. The mother of Sukesh is Saritha. So, Saritha is mother to Sukesh.
2) B is son of C’s grand father’s only daughter. How is C’s father related to B? a) Grand father b) Uncle c) Father d) cant not determine e) None of these Answer : c) Father. Explanation : C’s grand father’s only daughter means C’s mother. B is son of C’s mother. So, B and C are siblings. C’s father is B’s father too. 3) Pointing to a boy Uma said, “He is the son of my mother-in-law’s only child”. How is the boy related to Uma? a) son b) Grandson c) Nephew d) brother e) None of these Answer : a) son. Explanation : my mother-in-law’s only child = Uma’s mother-in-law’s only child = uma’s husband. The boy is the son of Uma’s husband. So, Uma is mother to that boy and that boy is son to Uma.
4) B is husband of C. A is sister of B. D is sister of C. How is D related to B? a) Son b) uncle c) Father-in-law d) Sister-in-law e) None of these Answer : d) sister-in-law. Explanation : B is husband and C is his wife. A is sister of B means A is sisterin-law of C ( husband’s sister). And D is sister of C means D is sister-in-law of B ( wife’s sister). 5) Pointing towards a girl, a teacher said, “She is the only daughter of the only son of the wife of the father-in-law of my wife”. How is the girl related to the teacher? a) Niece b) Daughter c) Sister d) Daughter-in-law e) None of these Answer : b) Daughter. Explanation : father-in-law of my wife = father-in-law of teacher’s wife = teacher’s father. Wife of the father-in-law of my wife = wife of teacher’s father = teacher’s mother. Only son of teacher’s mother = teacher ( teacher’s parents do not have any other child ). So, she is only daughter of teacher as the teacher does not have any other children.