Answer:
80, because the word -octo- is in it and words with -octo- or something like that in it would most likely have something to do with 8. Like these words:
octopus- 8 legs
ocho- 8 in Spanish
octave- move 8 white notes in piano (I only know that because I've played the piano)
otto- 8 in Italian
acht- 8 in German (it sounds like oct)
I'm not gonna bore (boar?) you anymore with this knowledge and talk about the number 8.....