X can finish a work in 3 days less than that of Y, X alone worked for 4 days and the remaining work was completed by Y. If the whole work took 14 days, in how many days can X and Y alone complete the work ?
A family consists of six members P, Q, R, X, Y and Z. Q is the son of R but R is not mother of Q. P and R are a married couple. Y is the brother of R. X is the daughter of P. Z is the brother of P.
Who is the brother-in-law of R ?