Blood Relations Questions

At a wedding reception, a man pointed to the groom and described him as the brother of the son of his grandfather's son. How is the groom related to that man?

In a certain code language:
* '$A+B$ ' means 'A is the wife of B's brother',
* '$A-B$ ' means 'A is the sister of B',
* '$A\times B$ ' means 'A is the wife of B',
* '$A÷B$ ' means 'A is the daughter of B'.

Based on the above, if the expression is '$G+K-L÷M\times Q$ ', how is G related to Q?

In a certain code language,
$A+B$ means '$A$ is the Brother's Wife of $B$ '
$A-B$ means '$A$ is the Sister of $B$ '
$A\times B$ means '$A$ is the Wife of $B$ '
$A÷B$ means '$A$ is the Daughter of $B$ '

Based on the above, how is $G$ related to $Q$ if '$G+K-L÷M\times Q$ '?

At a wedding reception, a man pointed towards the groom and claims the groom to be the brother of the son of his grandfather’s son. Who is the groom to the man?

In a certain code language:
* ‘A + B’ means ‘A is the father of B’;
* ‘A − B’ means ‘B is the sister of A’;
* ‘A × B’ means ‘A is the wife of B’ and
* ‘A ÷ B’ means ‘A is the mother of B’.

Based on the above information, how is T related to V if the expression is ‘R × S − T ÷ P + V’?

In a certain code language,
* '$A+B$ ' means 'A is the father of B',
* '$A-B$ ' means 'A is the husband of B',
* '$A\times B$ ' means 'A is the mother of B',
* '$A÷B$ ' means 'A is the brother of B'.

How is P related to T if the expression is '$P+Q-R\times S÷T$ '?