TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Mountain zebras can live up to _ days without drinking water.

SOLUTION: three

PROBLEM: Lobsters have _ walking legs and two legs bearing claws.

SOLUTION: eight

PROBLEM: Doctors say the average adult needs seven to _ hours of sleep a night.

SOLUTION:
nine