![]() The system is based upon ten (originally nine) glyphs. The system had spread to medieval Europe by the High Middle Ages. 825) and Al-Kindi ( On the Use of the Hindu Numerals, c. It became more widely known through the writings of the Persian mathematician Al-Khwārizmī ( On the Calculation with Hindu Numerals, c. The system was adopted in Arabic mathematics by the 9th century. It was invented between the 1st and 4th centuries by Indian mathematicians. The Hindu–Arabic numeral system or Indo-Arabic numeral system (also called the Arabic numeral system or Hindu numeral system) is a positional decimal numeral system, and is the most common system for the symbolic representation of numbers in the world. ![]() Modern-day Arab telephone keypad with two forms of Arabic numerals: Western Arabic numerals on the left and Eastern Arabic numerals on the right ![]()
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