Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Elephants rise ____ inches when they inhale.
two

Soy products contain ____ known classes of anti-cancer agents, including phytoestrogens.
five

Egoism is of ____ kinds, gross and subtle.

two