Numbers in Ancient Greece

Greeks used numbers first in B.C.600. They used 5 as the assistant base because they wanted to simplify numbers. They show numbers like 5  x 10 or 5 x 10. Their calculations based on addition principle. At tho following you can see some greek numbers.

Roman Numbers

They are similar to Greek numbers. They are so complicated that no one can make hard mathematics calculations. These numbers are made of symbols and they used to not forget the numbers. Nothing more about Roman numbers because it is not a good number system.