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I was taught that the numerals {0,1,2,...,9} are from the Arab alphabet. But they look completely different from today's Arab letters. I wonder what is the origin of Arabic numerals?

Edit: The web page of above link claims that Arab numerals were developed in ancient India first and then spread to Arab, and later to Europe and the rest of world. This only means numerals themselves as symbols, not the arithmetical system for numerical computations.

Note that there are 2 distinct concepts: arithmetic and numerals. Arithmetic is a number system (often in decimals) which allows easy operations for number. Numerals mean symbols for representation of number.

Numerals without arithmetic is very inefficient for numerical computations compared to arithmetic one. One example of it is Roman numerals. The widely used numerals with arithmetic today is Arab numerals.

Arithmetic was discovered originally in several countries from as early as 1st century AD. For example, Chinese discovered arithmetic with the decimal system of number and rules of numerical operations (Chinese numerals) in "The Nine Chapters on the Mathematical Art" in 1st century AD. Chinese numerals are in Chinese characters and so are not widely known to the rest of world.

As in the answer by @M. Farooq below, it seems that recently there are many webpages have highly inaccurate and even wrong information to give India unfair credit for many works in mathematics and science (ancient and modern). Be aware of this situation and do not easily believe information from some webpages.

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The problem with very old historical stuff including the origins of a certain concepts and giving due credit where it is due is one of the most difficult questions in history. The truth is that we may never know the correct picture behind the question who invented the modern number system? No matter what Wikipedia says. Anyone who is serious scholar of scientific history, Wikipedia should be their last resort to provide a proof. It must have been a very slow progress based on cross-cultural exchange of knowledge. About a thousand years ago, Middle east and central Asia were the center of knowledge just like today's Europe and North America. Some scientific words from Arabic origin still linger in modern mathematics and chemistry, such as algebra (named after a treatise with this title), algorithm (named after an Arabic mathematician), alcohol, boron, chemistry, alkali, natron etc. This shows that translation of Arabic into Latin was an active process in Europe. Translation is a sign of a progressive society.

For instance, OED entry for Arabic numerals traces the word usage history:

Designating the system of numerals written 0, 1, 2, 3, 4, etc.; of or relating to this system. Chiefly in Arabic numeral. Contrasted with Roman. Arabic numerals reached western Europe through Arabia by c1200, but probably originated in India

The earliest usage goes back to 1750s:

1756 Gentleman's Mag. May 239/1 The learned are not quite agreed when the Arabic numerals were first brought into use in this nation.

which clearly shows that nobody was even sure when these numbers were brought to Europe. Also note the word probably. Some falsely imply that these medieval Arab scholars were mere translators of Greek and Indian works. This is a fabricated story as well because as stated above, translation of scholarly work is a part and parcel of science.

Civilization near the Indus valley (now India, Pakistan) have 3000-4000 year old culture and they had their system of weights for trading. Certainly, they knew how to count as well. China had its own set of philosophers. Since the languages of these cultures was so different, it is extremely difficult to trace the ancient history of science. There is very little primary source of information. Today we can look up 18th century articles and say that this and that person is behind this concept but this does not apply to older work. If the Egyptians could build such huge pyramids thousands of years ago (predating all) which still startles modern civil engineers, can we say that they knew trigonometry very well? Nobody knows, because they did not leave anything which we can understand yet. Who knows how much knowledge was lost with time and then re-invented.

Recently, there are series of rather ridiculous claims in History of Science and Mathematics, and even Physics that everything originated in ancient India. Claims range from invention of alegbraic formulae, sine, cosine, numbers, astronomy, distance between Earth and Sun, ancient aircrafts, stem cell research and above all close relationship of German and Sanskrit. Usually Wikipedia and other dubious sources are quoted. BBC even made a report on it, sadly this is being propagated by some obscure university professors. One can only imagine how many students are misled. Perhaps these awed students are posting a series of these questions all over the web.

India: scientists dismiss Einstein theories

The moral of the story is that paper never refused ink. Web is worse, because everyone can propagate false ideas. Our job is to filter junk vs. good work.

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    $\begingroup$ +1 The inferiority complex is everywhere. I saw hundreds of such claims on youtube, quora and other sites. That's why I left them. You get always attacked if you speak something well researched. $\endgroup$ – Paracosmiste May 7 at 19:18
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    $\begingroup$ You nailed it perfectly-this is nothing but inferiority complex. This is exactly my experience. The moment you question the claims, things become bitter. I tried modifying a statement on Wikipedia about the history of sine, cosine by adding a quote from the Oxford English Dictionary. It was deleted every time by a stubborn person who happened to be a university teacher. Sad! $\endgroup$ – M. Farooq May 7 at 20:28
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    $\begingroup$ My IP got banned on wikipedia from these people. That's why I don't trust it anymore. There's 1.4 billion indians; I have no chance. $\endgroup$ – Paracosmiste May 7 at 20:32
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    $\begingroup$ Wikipedia should be the last resort of any serious research work. I usually aim to find the primary sources from Hathi Trust and Internet Archives. It is open to editing by everyone. It is a very organized propaganda on ancient math history in this forum and elsewhere. If math and astronomy originated in ancient South Asia so what happened today? It should have been leading the whole world today in science. $\endgroup$ – M. Farooq May 7 at 20:45
  • $\begingroup$ Check this and this comment I read yesterday on youtube. According to them NASA and everything will collapse without them. The irony is that they post all these claims on platforms created by americans and europeans (like stackexchange, wikipedia, youtube, quora... ). $\endgroup$ – Paracosmiste May 7 at 23:11
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You can see the origin of modern numerals and zero from Sanskrit, carved in granite, also at

https://youtu.be/pElvQdcaGXE?t=101

in a Temple for zero in a talk by Marcus du Sautoy who looks at the contribution of Ancient Indians like Aryabhata, Brahmagupta, Bhaskara, Madhava, etc

Programme: BBC - The Story of Maths Presenter: Marcus du Sautoy

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  • $\begingroup$ These videos mean nothing. Do you have some peer reviewed articles to back these claims. I've watched and read that indians invented and discovered trigonometry, algebra, calculus, gravitation, the laws of mechanics, real analysis, etc. Also many indians claim online that without them there will be no technology, no satellites, no space exploration... This wave has to stop; who's feeding them these lies?! $\endgroup$ – Paracosmiste May 21 at 18:54
  • $\begingroup$ Not at all. In Figure 2. A folio from the Bakhshali manuscipt, copied from G R Kaye's 1930 edition. In the middle are two large numbers, with some part on the right missing, forming numerator and denominator of a fraction. It is part of a verification and the fraction is reconstructed to be 50,753,383,762,746,743,271,936 / 7,250,483,394,675,000,000 Courtesy: Bill Casselman The birch bark plate is shown in ias.ac.in/article/fulltext/reso/017/03/0236-0246 $\endgroup$ – Partha Shakkottai Jul 19 at 23:32

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