The conversation between human and AI assistant.
Which country's number system is the oldest and most organized?
Interesting. Is there any other information you can give me about the Hindu-Arabic numeral system?
Sure. Originally, the system only used nine digits and a zero, which was invented in India in the 5th century. The digits were then adopted by Islamic scholars and introduced to Europe during the Middle Ages. Today, the Hindu-Arabic system is used by most of the world's countries, including those that do not have a strong historical connection to India or the Arab world.