TASK DEFINITION: Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
PROBLEM: Most insects have one or ____ pairs of wings.

SOLUTION: two

PROBLEM: Spiders have only ____ body divisions and eight legs.

SOLUTION: two

PROBLEM: Slack tides occur three or ____ times.

SOLUTION:
four