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: Babies start swimming lessons as young as ____ weeks old.

SOLUTION: four

PROBLEM: Photosynthesis has ____ main sets of reactions.

SOLUTION: two

PROBLEM: Current statistics give a person living today a ____ in three chance of dying from with cancer.

SOLUTION:
one