In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Smokers die an average of six to _ years earlier than nonsmokers.
[EX A]: eight

[EX Q]: Most smokers try to quit at least _ or six times before they succeed, researchers say.
[EX A]: five

[EX Q]: Most insects have _ pairs of legs, one pair on each segment of the thorax.
[EX A]:
three