Copying math tests would likely violate copyright.
I am not a lawyer, and this isn't legal advice. If you want actual legal advice, hire an actual lawyer with actual money.
In the examples you're showing, your Chapter 15 consists entirely of practice tests, each of which is labelled with the name of an event. If those tests are composed of tests from those events (or from any other event, for that matter), the copying of those tests would likely constitute a breach of copyright unless you got the permission to do so from the copyright owners of those tests.
If the named events aren't real events, but they do include the names of fictional characters or properties, they might not be copyright violation, but they might constitute trademark violation.
Additionally, there would be an academic ethics violation of plagiarism separate to any of the above legal violations if you have copied any material, and failed to properly cite it. While this wouldn't have any legal repercussions, it might result in you being fired from your place of employment and getting a significant black mark on your reputation in the academic world.