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 orthoptists work ____ hours a day, four or five days a week.

SOLUTION: eight

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

SOLUTION: four

PROBLEM: Sexual maturity is reached at about ____ years.

SOLUTION:
three