Hello,
I'm interested in your job offer, because I've already completed one such project in my past. Theme was History, and as my husband has a Doctor Degree in History, he helped me to fulfill that tasks, as a result client was fully satisfied. When it comes to number of questions it's depends on few matters: for whom questions should be made (children, what is the age, or adults) , about which country/countries do you want to have those questions made, because it's also really important and what's the payment and the deadline.
I can prepare for you historical, Books and authors, even Sports questions. Let me know more details and we can discuss it over pm.
Best regards,
Tetyana