Exam web app

Kindly, I would like to have a web app, where users can find School Grades like 1-6, and when you choose a grade you'll get Subjects / e.g Math. Then Chapter and section. when you choose any of these you can choose how many question do you need the exam to be. you'll get random questions with multiple answers or match the correct choose. from a big list pre-configured by Admin. lets say you need 10 question of math for Grade 4th from only Chapter 2 or 1 and 2. so you will choose all these filters then you click on generate you will get random 10 questions exam. every time. you can export this to word or pdf to print it. That's all.