In Course Navigation, click the Quizzes link.
Click the Settings icon [1] and click the Manage Question Banks link [2].
Click the title of the Question Bank.
Click the move/copy question to another bank link to move/copy the question to another question bank.
Click the title of the bank [1] where you would like to copy/move the questions. Click the Keep a copy in this question bank as well checkbox [2] if you only want to copy the question. Then click the Move/Copy Questions button [3] to copy the question.
View the moved/copied question in the new bank.
Note: Changes to questions won't automatically update quizzes that are already using those questions unless you remove the question and re-add it.