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: Cardiovascular disease is the cause of more deaths than the next ____ causes of death combined.

SOLUTION: seven

PROBLEM: Climbers are the most frequent cause of injury for children ____ and older.

SOLUTION: six

PROBLEM: Today there are more than ____ million known chemicals.

SOLUTION:
eight