I knew about Arabic numbers of course, but I was wondering what the original symbols looked like. And this became interesting.
Wikipedia calls this the Hindu-Arabic numeral system. Europeans called it Arabic because it was introduced to them by the Arabs. The Arabs called it the Hindu numbering system because it was introduced to them by India, where it was invented.
https://en.m.wikipedia.org/wiki/Hindu%E2%80%93Arabic_numeral_system
The symbols most similar to modern numbers are in the Devanagari and Gujarati scripts of India, although some of the numbers seem transposed. The Arabic numbers are very different.