TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Reds can benefit from seven to _ years' aging .

SOLUTION: nine

PROBLEM: Normal adults appear to require _ to eight hours of sleep per day on average.

SOLUTION: six

PROBLEM: Fit people are also _ times less likely to die from heart disease.

SOLUTION:
eight