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

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


[Q]: Mares normally give birth to their first foal when they are between _ and six years of.
[A]: three


[Q]: Childhood cancers are _ times higher than the national average.
[A]:
six