Q: changing the answers to the security questions

Not on your own. You need to ask Apple to reset your security questions; this can be done by clicking here and picking a method, or if your country isn't listed, filling out and submitting this form.

They wouldn't be security questions if they could be bypassed without Apple verifying your identity.

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Alternatives for Help Resetting Security Questions and/or Rescue Mail

     1. If you have a valid rescue email address, then use this procedure:

         Rescue email address and how to reset Apple ID security questions.

     2. Fill out and submit this form. Select the topic, Account Security. You must

         have a Rescue Email to use this option.

     3. This is the only option if you do not already have a valid Rescue Email.

         These are telephone numbers for contacting Apple Support in your country.

         Apple ID- Contacting Apple for help with Apple ID account security. Select

         the appropriate country and call. Ask to speak to the Account Security Team.

     4. Account security issues almost always require you to speak directly to an

         Apple representative to securely establish your identity as the account holder.

         You can set it up so that Apple calls you, either immediately or at a time

         convenient to you.

            1. Go to www.apple.com/support.

            2. Choose Contact Support and click Contact Us.

            3. Choose Other Apple ID Topics and choose the appropriate topic for

                your issue.

            4. Follow the onscreen instructions.

         Note: If you have already forgotten your security questions, then you cannot

         set up a rescue email address in order to reset them. You must set up

         the rescue email address beforehand.

Your Apple ID: Manage My Apple ID.

                        Apple ID- All about Apple ID security questions.