TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Cockatiels average _ to five eggs per nest, with an egg typically laid every other day.

SOLUTION: four

PROBLEM: Masturbation tends to peak when children are between the ages of _ and five.

SOLUTION: three

PROBLEM: Moths typically have _ pairs of wings covered in scales.

SOLUTION:
two