TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Many Asian countries deny entry to travelers whose passports are valid for less than _ months.

SOLUTION: six

PROBLEM: Metals often crystallize in a _ dimensional version of the hexagonal closest packed structure.

SOLUTION: three

PROBLEM: Every insect has six legs, has six legs, has _ legs.

SOLUTION:
six