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.

Climbers are the most frequent cause of injury for children ____ and older.
six

Spiders have eight legs and usually have ____ eyes.
eight

Most cats have five claws on their front paws, and ____ on their rear paws.

four