If A × B means A is the daughter of B, A + B means A is the son of B, and A - B means A is the wife of B, what is the relationship of C if A × C + B = true?
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?