TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Weasels reaching _ to six years are regarded as fully mature.

SOLUTION: five

PROBLEM: Water is able to diffuse freely between the _ cells.

SOLUTION: two

PROBLEM: Acupuncture needles are about two to _ inches long.

SOLUTION:
three