I think it was an arab that invented numbers/maths,
They were introduced into Europe in the 10th C by the Arabs of North Africa who were using the digits throughout the northern half of the continent.The Arabs called these Hindu Numerals, but as the Europeans were unaware of their origins, they called them Arabic Numerals.
They were developed by indian mathematicians. I don't think it was anyone in particular, more of a group effort. They are known as arabic numerals to us because it was the arabs that introduced them to us.