Why 30 facts?
As medical students, we analyzed years of practice exams and ranked every concept by how frequently it appeared and how heavily it was tested.
What we found was a classic case of diminishing returns. The first 30 concepts cover a disproportionate amount of what you need to know. After that, each additional concept adds less and less value.
Coverage vs. Facts Learned
The curve flattens after ~30 facts — the point of maximum efficiency.
This is the "sweet spot" — where you get the most return for your study time. Learn these 30 facts cold, and you've covered 21% of high-yield content without drowning in minutiae.
We're not saying you should only know 30 things. But if you're short on time (and who isn't?), these are the 30 concepts that give you the best bang for your buck.