Hindu–Arabic numeral system system is based upon ten (originally nine) different glyphs. The symbols (glyphs) used to represent the system are in principle independent of the system itself. The glyphs in actual use are descended from Brahmi numerals and have split into various typographical variants since the Middle Ages. These symbol sets can be divided into three main families: Western Arabic numerals used in the Greater Maghreb and in Europe, Eastern Arabic numerals (also called "Indic numerals") used in the Middle East, and the Indian numerals used in South Asia. The Hindu-Arabic numerals were invented by mathematicians in India. Perso-Arabic mathematicians called them
Strike/Flight numerals Strike/Flight numerals A Strike/Flight Numeral is a Department of the Navy device that may be awarded for wear on the Air Medal to individuals serving in any capacity in the United States Armed Forces. A Strike/Flight Award is awarded to individuals for meritorious achievement while participating in sustained aerial flight operations, under flight orders. Strike/Flight Numerals are bronze Arabic numerals 5/16 inch in height and are worn to denote the total number of Strike/Flight awards Only personnel under flight orders are eligible to receive the strike/flight award of an Air Medal. Officers in the rank of Captain (Colonel in the