Little is known about the life of the Greek mathematician Diophantus. However, his work led to one of the greatest mathematical challenges of all time, Fermat's last theorem. He was born in Alexandria somewhere between 200 and 214 BC. Alexandria was the center of Greek culture and knowledge and Diophantus belonged to the ‘Silver Age’ of Alexandria. Altough little is known about his life, according to his riddle, he got married when he was 33, had a son who lived for 42 years and was 84 when he died. During his life, Diophantus wrote the Arithmetica, the Porismata, the Moriastica, and On Polygonal Numbers. Arithmetica originally had thirteen books, out of which we only have six. It is a collection of problems giving numerical solutions of both determinate and indeterminate equations. The information from these books tell us that Diophantus studied from Babylonian teachers. Porismata is a collection of lemmas, although the book is entirely lost. One such lemma is that the difference of the cubes of two rational numbers is equal to the sum of the cubes of two other rational numbers. The Moriastica is thought to have treated computation with fractions. Only fragments of Diophantus' books On Polygonal Numbers, a topic of great interest to Pythagoras and his followers, have survived. Diophantus is often called “the Father of Algebra" because he contributed greatly to number theory, mathematical notation, and because Arithmetica contains the earliest known use of syncopated notation. 2. Fermat’s solution was called his "Last Theorem”: "If an integer n is greater than 2, then an + bn = cn has no solutions in non-zero integers a, b, and c. I have a truly marvelous proof of this proposition which this margin is too narrow to contain." 3. British mathematician Andrew J. Wiles was born April 11, 1953, in Cambridge, England, where his father was a professor of theology. In the Cambridge library, ten-year-old Wiles first came across Fermat's Last Theorem, and it...

...Diophantus
(200 AD. - 284 AD.)
I found very little known facts about Diophantus's life. Some of the things I found though were that he studied at the University of Alexandria in Egypt. He is know as the "Father of Algebra". He did numerous things for the world of mathematics. One of his greatest contributions is the book of Arithmetica.
The most I have found about his life is that he was married at the age of 33 and had a son who dies at the age of 42. That's 4 years before Diophantus dies at 84. Diophantus had people put a riddle on his tomb to find out how old he was. It stated:
God granted him to be a boy for the sixth part of his life, and adding a twelfth part to this, he clothed his cheeks with down. He lit the light of wedlock after a seventh part, and five years after his marriage He granted him a son. Alas! Late-born wretched child; after attaining the measure of half his father's life, chill Fate took him. After consoling his grief by this science of numbers for four years, he ended his life.
How old did Diophantus live to be?
First you have to know that Diophantus came up with the idea of using 1 variable to solve a problem. To solve this problem you would need to get this equation:
(1/6)x + (1/12)x + (1/7)x + 5 + (1/2)x + 4 = x
Then solve for x: the answer should be x = 84....