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.

[EX Q]: All orthodontists are dentists, but only about ____ percent of dentists are orthodontists.
[EX A]: six

[EX Q]: Perennials are plants that live more than ____ growing seasons.
[EX A]: two

[EX Q]: Hexapods comprise insects and three small orders of insect-like animals with ____ thoracic legs.
[EX A]:
six