If someone copies and pastes a set of question and answers from one document to another, if they copy original formatting, the styles, complete with numbering, transfer into the new document.

What do you suppose might happen if someone tries editing a document fixed with your macro or create a new test from copied questions and answers. They will be stuck in the original spot.

Yes, an empty paragraph is more intuitive than styles or using a wildcard replace or using a macro. You are correct that a find-replace without the empty paragraph would be difficult. A macro would be required without it to repair an existing document. That is why I said that it would work if there was an empty paragraph.

The styles are intended to be used to start a new test. Once they are in place they work very well. It makes it easy to rearrange question sets. Any yes, I expect that people will use styles. It is a basic Word skill. I recognize that this expectation is faulty. Most Word users know little of styles. I keep trying.