ADJ.
finished
VERB + EIGHTY-FIRST
appears
EIGHTY-FIRST + NOUN
page
PREP.
in, on
adj
The ordinal form of the number eighty-one, describing a person or thing in position number 81 of a sequence.
The answer appears on the eighty-first page of the book.
She finished eighty-first in the race.
noun
One of eighty-one equal parts of a whole.
An eighty-first of 1620 is 20.