Arabic Numerals
The common system of number notation in use in most parts of the world today is the Arabic system. This system was first developed by the Hindus and was in use in India in the 3rd century BC. At that time the numerals 1, 4, and 6 were written in substantially the same form used today. The Hindu numeral system was probably introduced into the Arab world about the 7th or 8th century AD. The first recorded use of the system in Europe was in AD 976.
The important innovation in the Arabic system was the use of positional notation, in which individual number symbols assume different values according to their position in the written numeral. Positional notation is made possible by the use of a symbol for zero. The symbol "0" makes it possible to differentiate between 11, 101, and 1001 without the use of additional symbols, and all numbers can be expressed in terms of ten symbols, the numerals from 1 to 9 plus 0. Positional notation also greatly simplifies all forms of written numerical calculation.
Follow the instructions and you'll see how easy is to indentify your coins, even if you don't know a single arabic word. You just have to memorize the following number and everything will be ok.
While Arabic letters are written from right-to-left, numbers in Arabic are written from left-to-right. For example: the following number is "120", not "021".
In the Arabic world the Hejira date may be indicated in Arabic numerals and the Christian date in Western numerals, or both dates represented in either form. Some coins carry dates according to both locally observed and Christian eras.
Some countries, such as Morocco, Algeria, and Tunisia, use the Western "Arabic" numerals, for example, 1984 instead of:
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