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.

ATMs are expensive machines with an average useful life of ____ to fifteen years.
ten

Red pandas have ____ toes that are widely separated and semi-retractable claws.
five

Most insects have four to ____ molts, but some have over twenty.

eight