TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Butterflies have _ pair of legs - each divided into five parts.

SOLUTION: three

PROBLEM: Plasma levels fall by about a half within three to _ hours.

SOLUTION: four

PROBLEM: Healthy foals grow quickly and can put on up to _ pounds or over a kilo a day.

SOLUTION:
three