TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Most children start to get their adult teeth at about _ years of age.

SOLUTION: six

PROBLEM: Binary distillation separates _ chemicals.

SOLUTION: two

PROBLEM: Most voles are less than _ inches, and have a short, fur-covered tail.

SOLUTION:
three