Can you imagine if there aren't any number system in this world?
How can the human build their house?
How can a man buy something?
How can a man make a computer?
How can a man make a road?
How can a man make a type machine?
How can a man make a machine?
Hoe can a man measure something?
So, thank's God, You give us the ability to make a number system, and so to learn mathematics...