Recently I updated my devices to iOS7 unfortunately when I next went to purchase apps I was suddenly was requested to answer 2 security questions. What happened and I have no reason to understand iTunes thought I had a new iPad and iPhone. I never found the real answer to this however my problem was I could not remember the answers. In this world of internet and the many accounts I have this one stumped me. I grabbed a Fosters but that did not help lol I tried various answers non of which worked so after a few Fosters I finally hunted down iTunes support. I followed the prompts and called Apple support. The support was excellent, my iTunes support person walked through various questions sent a code to each device then after verifying whom I was and my devices were mine reset the questions. This took about 20 minutes on the phone which is not bad considering support with other it companies can take hours.
I then answer the questions that were reset and recorded the answers some where safe and bingo all was good.
I should point out regardless of where you are in the world ie travelling or living just call the local iTunes support number and they will look after you. Below is the link that you need if this happens to you.
Rescue email address and how to reset Apple ID security questions