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]: Echinoderms have radial symmetry , many having ____ or multiples of five arms.
[EX A]: five

[EX Q]: Coyotes can often live six to ____ years in the wild.
[EX A]: eight

[EX Q]: Philosophical ethics includes ____ different domains.
[EX A]:
two