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: Females become sexually mature at the age of ____ years.

SOLUTION: five

PROBLEM: Most species have four toes, ____ of which are forward-pointing.

SOLUTION: three

PROBLEM: Many doctors recommend waiting ____ to six weeks before resuming sexual intercourse.

SOLUTION:
five