Answer:
The only thing I can think of would be the numbers on mailboxes or apartment doors (address numbers). Those are the only numbers I imagine you would be seeing on houses and things but I am not 100% sure of this answer.
Then don’t give the person the job
Answer:
the best that describes a very lazy pet cat is A(Indolent).
The correct sentence is "In health class we studied these systems: endocrine, circulatory, and nervous."
You use colon to introduce a set of items. In this case, the set of items are what "we" studied in health class.