Ok. First: Evxaristo! Thank you for your patience and for the time you take to answer my questions.
Second: let's revise a little!
Thousand is feminine. Any determination of the word thousand goes feminine too, with all the necessary changes. So "hundreds" becomes feminine when we talk about "hundreds of thousands" because "hundreds" is like an adjective for "thousands"(what kind of thousands?-hundreds) So we make the accord between the noun and the adjective. Ok that's Romanian
, so, it's easy. I noticed that the final letters are the same in this two words(ες), but I suppose that's because in fact both of them are nouns and only in this syntagma they are in an adjective-noun relationship. Question: feminine adjectives in greek usually have the same last letters as the noun they determine, according to the grammatical case(nominative, accusative, etc). ?
Bottom line: Did I get it right with the rule regarding the changes the word κόσια suffers when connected with χιλιάδες?
And another question: κόσια is also a feminine noun? So should I say "μία κόσια" and not "ένα κόσια" ?
Then, I noticed that 'τριά' suffers changes when connected to the same "χιλιάδες", it becomes "τρείς". Is there any other number from 0 to 9 which suffers similar changes? Let' take your example with 53.000.
50.000 πενήντα χιλιάδες,
51.000- πενήντα ένα OR μία χιλιάδες?
52.000- πενήντα δύο χιλιάδες?
54.000-πενήντα τέσσερα OR τέσσερις χιλιάδες?
And so on. I think you got my idea. Do these numbers change and how? I suppose they always look the same , I mean the 3 from 23.000 is the same with the 3 from 83.000, for example? So, what's the rule for each of them?
Ok, now, if you are tired of me, just say it and I'll stop!!! I promise!
Evxaristo!