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: Some clouds are so thick and dense that ____ stars can shine through.

SOLUTION: no

PROBLEM: Coastal kelp beds, for example, appear to be three times larger than in the past four or ____ years.

SOLUTION: five

PROBLEM: Buttercups have ____ to six petals or sepals.

SOLUTION:
five