Can I use "девятнадцать девяносто четвёртом" like in English "nineteen ninety four"?
No, Russian doesn't split the number of a year like that.
It seems that most languages don't.
It's better to put a hyphen between 'ninety' and 'four'; but when I did so, the program complained that it should have been a space instead. But here on this page the translation has the hyphen!
why is it wrong to write nineteen hundred and four?
Because that would be 1904, not 1994 :)
Я родилася в тысяча девятьсот пятьносто шестом = I (f) was born in 1956? I just wanted to see if I could build a sentence about myself.
"Я родилась в тысяча девятьсот пятьдесят шестом".
Ah - thank you. We haven't learned 50 yet.
You were tripped up by the fact that ninety is the odd one out. The other higher tens have a very consistent pattern:
50 - пятьдесят
60 - шестьдесят
70 - семьдесят
80 - восемьдесят
Ah - thank you - I wonder why DuoLingo chose to introduce the odd man out first.