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]: Sexual maturity is between ____ and six years of age.
[EX A]: three

[EX Q]: Some people routinely sleep only ____ hours a night but feel fine during the day.
[EX A]: four

[EX Q]: Asymmetric unit contains ____ molecules of the above compound.
[EX A]:
two