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.

[Q]: Sexual maturity is reached within ____ to four years.
[A]: two


[Q]: All orthodontists are dentists, but only about ____ percent of dentists are orthodontists.
[A]: six


[Q]: Millipedes can grow up to about ____ inches long.
[A]:
four