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

SOLUTION: six

PROBLEM: Cognitive changes are probably equivalent to about a three to ____ month delay in progression.

SOLUTION: six

PROBLEM: Most vertebrates belong in the first ____ groups.

SOLUTION:
three