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: Moths are most active during the first three to ____ hours of darkness.

SOLUTION: five

PROBLEM: Echinoderms have radial symmetry , many having ____ or multiples of five arms.

SOLUTION: five

PROBLEM: Today there are probably more than ____ hundred different schools of psychotherapy.

SOLUTION:
four