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]: Most babies double their birthweight by ____ to five months.
[EX A]: four

[EX Q]: Earthquakes are most frequent where ____ or more plates meet.
[EX A]: two

[EX Q]: Most salamanders have only four front toes but ____ rear toes.
[EX A]:
five