If X + Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X × Y means X is the cousin of Y, what is the relationship of Z to W if Z - W and W + Z are true?
In a coded relation, if M + N means M is the daughter of N, M - N means M is the son of N, and M × N means M is the grandfather of N, what is the relationship of O if M + O - N?
In a coded relation, if P × Q means P is the mother 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?