Short sets
Choose 10, 20 or 40 questions from any mix of topics, so a session fits into whatever time you have.
Pick a topic and answer 10, 20 or 40 questions. Every answer is explained, and your progress is tracked skill by skill.


How it works
Choose the topics you want, answer a short set, and read why each answer is right or wrong. Quanta keeps track of which skills are solid and which need more work.
Choose 10, 20 or 40 questions from any mix of topics, so a session fits into whatever time you have.
See why the correct answer is right, what each wrong choice gets wrong, and the worked math for calculations.
Each topic is split into the skills it tests, so you can see exactly what to review next.
Subjects
General Chemistry, Organic Chemistry, Biology & Biochemistry, Physics, and Psychology & Sociology, organized by the AAMC content categories. CARS is in development.

Accuracy
Answers and explanations are checked against references such as LibreTexts, NCBI’s StatPearls and university course materials, and every question has been through an independent second review.
If something still looks wrong, flag it from the question screen. The report reaches us with the question’s details filled in.