TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: People are born with _ kidneys.

SOLUTION: two

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

SOLUTION: one

PROBLEM: Fluorescent lights are _ to five times more efficient than incandescent bulbs.

SOLUTION:
four