Diophantus of AlexandriaAlgebra Level 4
Diophantus is one of the brilliant Greek mathematicians born around 250 AD. His birth until death may be determined from an epitaph revealing the fact that he passed a sixth of his life in childhood, a twelfth in adolescence and a seventh more as a bachelor. Five years after he got married, a son was born to him who died four years before Diophantus at one-half his father's final age. How old was Diophantus when his son was born?