Answer: Most scholars now believe that isolated civilizations first arose independently at several locations; initially in Mesopotamia around Tigris and Euphrates rivers and, a little later, in Egypt and the eastern Mediterranean. Other civilizations arose in Asia along the Indus River in modern India and the Yellow River in what is now China.
All these early civilisations had to invent or discover everything for themselves because unlike later civilisations such as the Greeks in the west or the Chinese in the east, they had no one to learn from. Therefore, the Egyptians had to invented mathematics, geometry, surveying, metallurgy, astronomy, accounting, writing, paper, medicine, the ramp, the lever, the plough, mills for grinding grain and all the paraphernalia that goes with large organised societies.
So how do we define Egyptian inventions today? It is very difficult to determine because three thousand years is a long time for discoveries to be made and lost or appropriated by others. For example the Greeks sometimes take the credit for inventing mathematics but they learned their math from the Egyptians then later developed and improved upon what the Egyptian achieved.
3000 BC appears to have been a critical time for the development of technology, especially metal making. The Egyptians as well as the Mesopotamians independently discovered that by mixing a small quantity of tin ore with copper ores they could make bronze which is harder and more durable. This set off a chain of connected innovations that could not have happened without the primary discovery.
Explanation: Hope this helps! :D