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Brahmi numerals are anumeral system attested in theIndian subcontinent from the 3rd century BCE. It is the direct graphic ancestor of the modernHindu–Arabic numeral system. However, the Brahmi numeral system was conceptually distinct from these later systems, as it was a non-positional decimal system, and did not includezero. Later additions to the system included separate symbols for each multiple of 10 (e.g. 20, 30, and 40). There were also symbols for 100 and 1000, which were combined inligatures with the units to signify 200, 300, 2000, 3000, etc. In computers, these ligatures are written with the Brahmi Number Joiner at U+1107F.

The source of the first three numerals seems clear: they are collections of 1, 2, and 3 strokes, inAshoka's era vertical I, II, III likeRoman numerals, but soon becoming horizontal like theHan Chinese numerals. In the oldest inscriptions, 4 looks like a +, reminiscent of the X of neighboringKharoṣṭhī, and perhaps a representation of 4 lines or 4 directions. However, the other unit numerals appear to be arbitrary symbols in even the oldest inscriptions.^{[citation needed]} It is sometimes supposed that they may also have come from collections of strokes, run together in cursive writing in a way similar to that attested in the development of Egyptianhieratic anddemotic numerals, but this is not supported by any direct evidence. Likewise, the units for the tens are not obviously related to each other or to the units, although 10, 20, 80, 90 might be based on a circle.^{[citation needed]}

The sometimes rather striking graphic similarity they have with the hieratic and demotic Egyptian numerals, while suggestive, is not prima facie evidence of an historical connection, as many cultures have independently recorded numbers as collections of strokes. With a similar writing instrument, the cursive forms of such groups of strokes could easily be broadly similar as well, and this is one of the primary hypotheses for the origin of Brahmi numerals.^{[citation needed]}

Another possibility is that the numerals wereacrophonic, like theAttic numerals, and based on theKharoṣṭhī alphabet. For instance, 4 "chatur" early on took a shape much like the Kharosthi letter 𐨖 "ch", while 5 "pancha" looks remarkably like Kharosthi 𐨤 "p"; and so on through 6 "ssat" and 𐨮, then 7 "sapta" and 𐨯, and finally 9nava and 𐨣. However, there are problems of timing and lack of records. The full set of numerals is not attested until the 1st-2nd century CE, 400 years after Ashoka. Assertions that either the numerals derive from tallies or that they are alphabetic are, at best, educated guesses.^{[citation needed]}

• Brahmi script

• Georges Ifrah,The Universal History of Numbers: From Prehistory to the Invention of the Computer. Translated by David Bellos, Sophie Wood, pub. J. Wiley, 2000.
• Karl Menninger (mathematics),Number Words and Number Symbols - A Cultural History of NumbersISBN 0-486-27096-3[1]
• David Eugene Smith andLouis Charles Karpinski,The Hindu–Arabic Numerals (1911)[2]

• Numerals
• Brahmic scripts

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