왜 다섯 아닌데 오라고 써요?
Because 인분 is a counter which takes Sino-Korean numerals, not native ones.
Does it sound strange if 혼자 comes right before the verb? "저는 오 인분을 혼자 먹어요"
no, and it is accepted now :)
If 혼자 is by myself, what is by yourself?
Same word. Just change the pronoun to you.
I thought when counting things we were supposed to use pure korean numbers, as in "저는 혼자 인분 다섯 개를 먹어요." Is that wrong? Thanks!
Maybe it's just with food?
There are.....multiple exceptions that are annoying trust me.