What is the best way to include the original question in an assignment?

So I've been doing math and physics homework using Latex for around a year now, but I usually just write the answers without including the original questions. I've seen others including the original questions in their homework tho and I am planning on doing so from now on, but I am not sure which libraries to use. I want to make it very clear which part is the question and which is the answer, e.g by surrounding the question by a rectangle, shading it, using a different font… What methods do you all use? And are there any conventions to keep in mind?