https://www.wolframalpha.com/pro/problem-generator/?source=nav
Wolfram Problem Generator: Online Practice Questions & Answers
Online practice problems for math, including arithmetic, algebra, calculus, linear algebra, number theory, and statistics. Get help from hints and Step-by-step...
practice questions ampwolfram
https://medical.uworld.com/usmle/usmle-step-2-ck/
USMLE Step 2 CK Practice Questions & Exams
practice questions ampusmleck