TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Cats There are thirty _ recognised species of cats and a whole host of subspecies or races.

SOLUTION: five

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

SOLUTION: three

PROBLEM: Black women giving birth have a four to _ higher rate of mortality than white women do.

SOLUTION:
one