If P + Q means P is the sister of Q, P - R means P is the mother of R, and R × S means R is the son of S, what is the relationship of Q to S in the expression P + Q - R × S?
In a coded relationship where A ÷ B means A is the father of B, A + B means A is the daughter of B, and A - B means A is the brother of B, what is the relationship of C if A ÷ B + C?
If X * Y means X is the son of Y, X + Z means X is the sister of Z, and Y - Z means Y is the mother of Z, what is the relationship of Z to X in the expression X * Y + Z?
If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C × B?
In the code language, if P - Q means P is the mother of Q, P + Q means P is the father of Q, and P ÷ Q means P is the sister of Q, what is the relationship of R if P - R + Q?