If P × Q means P is the father of Q, P - Q means P is the son of Q, and P + Q means P is the daughter of Q, what is the relationship of R if P × R + Q = true?
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?
If 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 son of B, what is the relationship of C if A - B ÷ C?