Suresh asked Ramesh to identify the person in a photo that the latter is holding. Ramesh responds, 'I have no brothers or sisters. However, that man's father is my father's son.' Who is the person in the phot o?

Pankaj (Male) pointed to a girl and said, 'Her paternal grandfather's only son's wife is my mother.' What is Pankaj's relation to that girl?

A + B means 'A is the wife of B'; A - B means 'B is the daughter of A'; A × B means 'B is the brother of A'; A ÷ B means 'A is the father of B'. If P + R × T - Q + S ÷ U, then how is P related to the mother of U?