If X - Y means X is the brother of Y, X + Z means X is the sister of Z, and Y × Z means Y is the father of Z, what is the relationship of X to Z in X - Y + Z?
In a coded relation, 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 son of Q, what is the relationship of R if P × R ÷ Q?
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 = true?
If A ÷ B means A is the sister of B, A * B means A is the father of B, and A + B means A is the mother of B, what is the relationship of C if A * C ÷ B?