Pointing to a girl in the photograph,Amar said,"Her mother's brother is the only son of my mother's father." How is the girl's mother related to Amar?

$A \div B$ means $A$ is the father of $B$,$A - B$ means $A$ is the wife of $B$,$A \times B$ means $A$ is the brother of $B$,$A + B$ means $A$ is the daughter of $B$.
If $P + R \div Q$,which of the following is true?

Introducing a man to her husband,a woman said,"His brother's father is the only son of my grandfather." How is the woman related to this man?

All the six members of a family $A, B, C, D, E$ and $F$ are travelling together. $B$ is the son of $C$ but $C$ is not the mother of $B$. $A$ and $C$ are a married couple. $E$ is the brother of $C$. $D$ is the daughter of $A$. $F$ is the brother of $B$.
How many children does $A$ have?

Pointing to a photograph of Hari,Vijay said,"The father of his sister is the husband of my wife's mother". How is Vijay related to Hari?

$A$ girl introduced a boy as the son of the daughter of the father of her uncle. The boy is the girl's: