M, P, Q, R, S, T and W are seven persons of three generations living in the same house. There are two married couples in the house. M is the only daughter of P, who is the paternal grandfather of T. R is the son of Q. T is the daughter of S. R is the father of W. T is the sister of W. How is W related to R?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Cannot be determined
A relation such as son or daughter needs the gender of the person. Place everyone in the family and check whether W’s gender is given anywhere.
R is the father of W, and T is the sister of W, so R is also T’s father
T is the daughter of S, so S is T’s mother and R’s wife
P is the paternal grandfather of T, so P is the father of R; Q, the other parent of R, is P’s wife
M is the only daughter of P, so M is R’s sister
W is R’s child, but nothing tells whether W is a male or a female: “T is the sister of W” gives only T’s gender
So W may be R’s son or R’s daughter: the relation cannot be determined
