When creating a new Apple ID for use with the iTunes Store or Mac App Store, you will be asked to provide an optional rescue email address.
If you are unable to remember your answers, you can choose to send an email to your rescue email to reset your security questions.
Note: The option to send an email to reset your security questions and answers will not be available if a rescue email address is not provided. You will need to contact iTunes Store support in order to do so.