Forgotten Security Questions/Answers
You need to contact Apple by:
1 - Use the Express lane and start here:
https://expresslane.apple.com
then click More Products and Services>Apple ID>Other Apple ID Topics>Forgotten Apple ID security questions.
or
Apple - Support -form iTunes Store - Contact Us
2 - Call Apple in your country by getting the number from here: http://support.apple.com/kb/HE57
or
Apple ID: Contacting Apple for help with Apple ID account security
3 - Use your rescue email address if you set one up
Rescue email address and how to reset Apple ID security questions
For general information see:
Apple ID: All about Apple ID security questions