Blood Relation Questions and Answers

Answer: D

B is E's brother, so the answer is None of the above.

C is the wife of B, and D is the father-in-law of C, so D is B's father. D is also the father of E, so B and E are siblings. B is a husband and the father of F, so B is male: B is E's brother.

The rest fits: the two married couples are B and C, and D and G (the housewife, B's mother). A and F are the children of B and C, so A is G's granddaughter.

'Sister' gets B's sex wrong, and 'Uncle' and 'Cousin' put B in the wrong generation or branch, when B and E are children of the same father, D.

Answer: D

C is A's son.

A and D are brothers. B is married to D, so E, who is married to one of the brothers, must be A's wife. G is the child of B and D. The family has 3 children, F, G and C; E has two of them, so F and C are the children of A and E.

F and G are the only girls, so C is a boy, the son of A (and E). C cannot be G's brother (G's parents are B and D), and he is a child, not anyone's father.

The 4 adults are A, D, B and E, which confirms the structure: two brothers and their wives.

Answer: B

The valid inference is A is the husband of D.

A, E (sons of F) and B (son of A) are males, so with equal numbers the other three, C, D and F, are female. D is the mother of a boy and a girl; the only boy who is not F's son is B, and the only girl available is C, so D's children are B and C.

B is A's son, so D is A's wife, and since there is only one married couple, A and D are it. A, B and C are not all female; E and F are not D's children (F is the elder generation); and D is F's daughter-in-law, not granddaughter.

Answer: B

There are 3 male members.

• P and R are brothers, so both are male.
• S is R's only son, so S is male.
• P and Q are a married couple; with P male, Q is P's wife.
• T is S's sister and U is P's mother, so both are female.

So the males are P, R and S, and the females are Q, T and U. The answer 2 forgets one of the brothers or the son, and 4 counts Q as male.

Answer: B

The expression is A*U÷J*M.

Decode it link by link:

• A*U: A is the husband of U.
• U÷J: U is the daughter-in-law of J.
• J*M: J is the husband of M.

U is the daughter-in-law of J and his wife M, and U's husband is A, so A is the son of J and M, and therefore the son of M.

The first and third options begin with A÷ or A−, which make A a daughter-in-law or a wife, so A would be female. In the last option, A is the husband of U, U is J's sister, and J is M's wife, which makes A the husband of M's wife's sister, not M's son.

Answer: B

Raj is the girl's father.

Raj's mother-in-law is his wife's mother. Her only daughter must therefore be Raj's wife. The girl's mother is Raj's wife, so the girl is Raj's daughter and Raj is her father.

Uncle would be possible only if the mother-in-law had another daughter, but the stem says 'only daughter'. Brother and husband do not fit, since Raj is married to the girl's mother.

Answer: A

The doctor who is the mother of R and U is married to the teacher T, so the doctor is S. The other couple is Q the lawyer and P. P has a son (T) and a grandson, so P is the parent of T.

The two married women are S, the doctor, and P, since Q the lawyer is male. The housewife is therefore P, option A.

It helps to draw the family tree. T and the doctor S are a couple with children R and U, and P and Q are the second couple, P being the parent of T. Q is the lawyer and a man, since P is a woman married to him. The two married women are S, the doctor, and P, who has no profession given, which makes P the housewife.

Answer: B

P is M's maternal uncle.

Read the expression M ÷ L - N + P × Q step by step:

• M ÷ L: M is the daughter of L.
• L - N: L is the husband of N, so N is M's mother.
• N + P: N is the sister of P.
• P × Q: P is the brother of Q, so P is male.

P is the brother of M's mother, that is, M's maternal uncle. He cannot be her father (that is L), her son, or her grandfather.

Answer: D

D is B's brother.

A and his wife E have three children: B, C and D. B is a brother of C, and C is a sister of D, so C is a daughter. The statement that A (the husband of E) has only one daughter means C is that daughter, so the third child, D, must be a son.

D is therefore a son of the same parents as B, B's brother. 'Sister' is ruled out because C is the only daughter, and D cannot be B's mother or father since they are siblings.

Answer: A

M is O's son.

M is the son of P, and O is the husband of P. So O is M's father, and M is O's son. The information that Q is O's granddaughter does not affect the relation between M and O.

M is a son, so 'Daughter' and 'Mother' are wrong, and 'Father' reverses the relation: O is the father, M the son.