Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
If it's a nomber it's better to say "treti" - read as you write; accent is at the first syllable from the begining.
"tri" is a cardinal numeral. It can be used as an ordinal but it's not correct.
"treti" - ordin. numeral. In Bulgarian there is a gender, so: treti - masc., treta - fem., treto - neutr. Plural is independnt from gend. so - treti
This is a bus N3 - Tova e trojka.
N3 - treti nomer
I hope it helps.