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: Orangutans spend up to ____ hours a day eating or foraging for food.

SOLUTION: six

PROBLEM: Most babies double their birthweight by ____ to five months.

SOLUTION: four

PROBLEM: Crustaceans have ____ pairs of antennae.

SOLUTION:
two