The will of Arab mathematician Hua Lazimi: (His wife was pregnant with their first child at that time) "If my wife gave birth to a son for me, my son would inherit two thirds of the inheritance and my wife would get one third; ~ If it is a daughter, the wife inherits two-thirds of the inheritance and the daughter gets one-third. " Unfortunately, the mathematician died before the child was born. As a result, his wife gave birth to twins How can he divide his inheritance among his wife, son and daughter according to the mathematician's will?

It can be seen from his will that the hero wants his son: wife = 2: 1, and wife: daughter = 2: 1. Therefore, son: wife: daughter = 4: 2: 1. After division, the wife is 2/7, the son is 4/7, and the daughter is 1.