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

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

[EX Q]: Human sperm comes in _ varieties, mixed.
[EX A]: three

[EX Q]: Aboriginal society is divided into _ complementary branches.
[EX A]:
two