Secret questions are often just made up by the bank, airline, etc.

One bank kept asking me secret questions that were no way written by me...one of them was "what make of car did your Grandfather drive?" My grandfather didn't have a car; he drove a tractor. They made up the question & answer... Customer service at my credit union admitted that they just make up questions & answers...

So it's likely that the OP never wrote the answers to the questions he was asked..