Diophantus of Alexandria

Hello! My name is Diophantus. I lived a very, very long time ago, around the year 250, in a busy city in Egypt called Alexandria. Our city was famous for its Great Library, which was filled with scrolls and books about everything you could imagine! I wasn't a soldier or a king; I was a mathematician, which is a fancy word for someone who loves numbers and solving puzzles.

I spent my days thinking about numbers and writing them down. I wrote a very important book called 'Arithmetica.' It was filled with number puzzles, which today you might call algebra problems. Back then, people had to write everything out with words, like 'a number plus five.' It took a long time! I had a clever idea: What if I used a special symbol for the unknown number? It was like a secret code for math! This made solving problems much faster and easier to write down. It was a brand-new way to think about math.

A story that people told about me says that my whole life was a math puzzle! The riddle on my tombstone supposedly told the story of how old I was. It explained how long I was a child, when I got married, when my son was born, and how long he lived. If you solved the puzzle, you would know exactly how old I was when my story ended.

According to that puzzle, I lived to be 84 years old. Even though I lived centuries ago, my book 'Arithmetica' was so important that people studied it for over a thousand years. My idea of using symbols for numbers helped create the algebra that students all over the world learn in school today. That’s why some people call me the 'father of algebra,' and it all started with my love for a good puzzle!