I've always wondered this. In the math section, let's say a person answers every question right. Do the questions keep getting harder, or do they plateau at a certain point. So in this scenario would question #37 be a lot more difficult than say #25, or would they all be in the 750+ range of difficulty?
The test has no infinite difficulty questions so they do plateau.
If you keep answering them correctly, the questions in a certain topic will plateau to high difficulty. If the next question is from a different topic, the test may start probing from middle level, to establish your proficiency in that topic. If you answer it correctly the next question in that topic, whenever it happens, will be higher level untill that topic plateaus at high difficulty too.
