Warning: Issues can occur with duplicating and editing existing questions. We do not recommend using the following technique UNLESS the questions have never been used or even associated with an existing quiz.
Duplicating a question
Go to the course homepage.
Find the Administration block:
Click Question bank.
Find the question, then click the Duplicate icon. The Edit a [question type] page opens.
Edit the question name as needed.
The title appends "(copy)" to it. You must rename the question. DO NOT delete "(copy)", or you will create multiple questions with the same title.