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: Object permanence is seen in children ____ to twelve months old .

SOLUTION: eight

PROBLEM: Most species have four toes, ____ of which are forward-pointing.

SOLUTION: three

PROBLEM: Energy is lost via ____ mechanisms.

SOLUTION:
three