JetBlue's customers came up with some inventive ways to answer the tough question.
Keeping track of the different passwords for all the websites and accounts we use can often feel like an impossible task.
When we inevitably fail we're left to try and reset the password for the 100th time, but even that can be complicated.
After dealing with the humiliation of failing the first test, we're then faced with a string of security questions to prove our identity.
But one airline has caused a stir with its users by posing a far more difficult question for most people to answer.