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: Food waste is transformed into soil-like humus in three to ____ days.

SOLUTION: seven

PROBLEM: Cockroaches have six legs, ____ antennae and some have wings.

SOLUTION: two

PROBLEM: Females usually reach sexual maturity at about four years of age, males at about ____ years.

SOLUTION:
six