how many names are we allowed to have on jiskha

no limit, but why bother?

must be because the object here is to help you learn to solve problems, not do whole homework assignments for you. If you post one or two and learn to solve them, you probably won't even need help on the other, probably similar, questions.

I had 12 and was banned for a day. I think that was why.

how many people have been banned from here before if it's okay to ask

On Jiskha, each user is typically allowed to have only one account. This means that you can have one username associated with your account.

If your question is regarding how many "names" or "display names" you are allowed to have on Jiskha, it is important to note that Jiskha does not have a specific policy on changing display names. However, it is generally recommended to maintain consistency and use a single display name to avoid confusion among users and facilitate meaningful interactions.

To change your display name on Jiskha, you can typically do so by accessing your account settings or profile information. The exact process may vary depending on the specific platform you are using to access Jiskha (e.g., mobile app, website). Look for options such as "Account Settings," "Profile," or "Edit Profile" to make any necessary changes. If you encounter any difficulties in changing your display name, you can reach out to the Jiskha support team for further assistance.