Muhammad ibn Musa al-Khwarizmi

Hello! My name is Muhammad ibn Musa al-Khwarizmi. It’s a long name, I know! I was born a very long time ago, around the year 780, in a place called Khwarazm, which was part of the Persian Empire. Growing up, I was fascinated by the world around me. I loved looking at the stars and was especially curious about numbers. Solving puzzles and figuring out how things worked was my favorite thing to do, and this curiosity put me on a lifelong path of discovery.

When I grew up, I heard incredible stories about a magnificent city called Baghdad. In those days, it was the heart of the world for learning! Around the year 820, I received an amazing invitation to work at a special place there called the House of Wisdom, or Bayt al-Hikma. It was like the biggest library and university you can imagine. The wise ruler, Caliph al-Ma'mun, had gathered brilliant scholars from all over the world to work there. We were surrounded by ancient scrolls and books, and we all shared ideas to learn more about mathematics, the stars, and the shape of our world.

At the House of Wisdom, I noticed that people needed a simpler, more organized way to solve everyday problems, like how to divide land fairly among family members or how to figure out business trades. To help, I wrote a book around the year 820 called 'The Compendious Book on Calculation by Completion and Balancing.' In my book, I introduced a very important idea I called 'al-jabr,' which means 'restoring' or 'completion.' It was a method for finding an unknown number in a puzzle by balancing both sides of the problem so they remained equal. This powerful idea was so useful that the word 'al-jabr' eventually became the word you use today: algebra!

Algebra wasn't my only project, though. Around the year 825, I wrote another important book that showed people a wonderful way of writing numbers that originally came from India. These are the same numerals we all use today: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9! Using these numerals made calculating so much simpler for everyone. Because I loved looking at the sky, I also worked on astronomy. I helped improve tables that tracked the movements of the sun and planets. I even helped create a new map of the world based on all the knowledge we had gathered at the House of Wisdom.

I lived a full and busy life, exploring the world through numbers. I passed away around the year 850. Even though I am gone, my ideas live on in so many ways. My name, al-Khwarizmi, was changed over time to become the word 'algorithm'—a set of steps to solve a problem, which is what computers use every second of every day! And of course, my idea of 'al-jabr' became algebra, which students still learn in schools all over the world. I am so happy that my love for solving puzzles helped create tools that are still helping people today.