Need Help-Get Random # of Range values from "Database Sheet"

hello.i am new to this site.hope i can get some help

i want to improve my quiz template. this is my idea.
Please see attached file

1) a user will enter the # of questions he wants to answer.
2) after clicking "Enter", random questions will be generated in the "Quiz Sheet"
3) Questions will come from "Database (Questions) Sheet". ( I plan to place at least 100 questions to this database).



any idea? thanks in advance