Need for creating of different languages and "nations" was given by simple rule :Divide et impera! Letters from above are "Greek" letters that were used those days in communication among people cause "Egyptian" syllables were non practical for trading and writing: i suppose we used same numerical system like those from clay tablets in Persepolis so 400 syllables+60 signs for numbers=460-500 signs.Too much. That's why "one voice one sign" alphabet was invented...I suppose "Egypt" had invented it for trading. Trading navy of Egypt used it.That means that "Greece" those days was part of the "Egyptian Commonwealth" ."Thracian" king fought with Philip 2 after "Egypt" had been occupied by "Persia".
I hope Cyrus will help us about numbers in ancient "Persian"!Sorry that will disappoint you but people those days were proud they were civilized&sanctified.