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

[EX Q]: Most women experience a menstrual period _ to six weeks after a miscarriage.
[EX A]: four

[EX Q]: Most polyps cause no symptoms and take five to _ years to change to cancer.
[EX A]: seven

[EX Q]: Feline hyperthyroidism causes thyrotoxicosis and is usually seen in cats over _ years of age.
[EX A]:
six