TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Cichlids are popular in the aquarium hobby for a _ reason.

SOLUTION: four

PROBLEM: All children normally wake up four or _ times each night after dreams.

SOLUTION: five

PROBLEM: Clutches are useful in devices with _ rotating shafts.

SOLUTION:
two