$A$ woman introduces a man as the son of the brother of her mother. How is the man related to the woman?

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 male members are there in the family?

Five persons namely $P, Q, X, Y,$ and $Z$ are sitting in a park. $P$ is the mother of $X$,who is the wife of $Z$. $Y$ is the brother of $P$,and $Q$ is the husband of $P$. How is $Q$ related to $Z$?

If $A + B$ means $A$ is the son of $B$,$A - B$ means $A$ is the husband of $B$,and $A \times B$ means $A$ is the sister of $B$,then which of the following shows the relation $Q$ is the maternal uncle of $P$?

$E$ is the son of $A$. $D$ is the son of $B$. $E$ is married to $C$. $C$ is $B$'s daughter. How is $D$ related to $E$?

If $X$ is the brother of the son of $Y$'s son,how is $X$ related to $Y$?