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.

[EX Q]: Females become sexually mature at the age of ____ years.
[EX A]: five

[EX Q]: Object permanence is seen in children ____ to twelve months old .
[EX A]: eight

[EX Q]: Pressure depends on ____ principles-depth and density.
[EX A]:
two