You can always edit the topic you created from the topic page on our web www.QuizUp.com.
You'll find all topics you’ve created on your profile - Click the topic you want to edit to enter the topic page.
On the topic page you have 3 tabs to choose from, Topic page, Settings and Questions. (See picture)
Click on the Questions tab to enter the question editorial. On this page you can edit all questions, answers, pictures, add and delete questions.