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.

Sexual maturity occurs at ____ to four years for females and four to five years for males.
three

Fuzzy logic is an attempt to combine the ____ techniques.
two

Poverty is especially prevalent among rural minorities, who number one if ____ of rural students.

four

