Brokerage login now requiring I answer these questions. Not a single one of these has a single answer I’d actually remember. They all have problems regarding what would actually count or multiple possible answers to choose from, or these are not things people would remember or they just don’t apply to most people.
I just make an extra entry in KeePass with a suffix and different icon. I treat the answer just like an additional password and put the question as username or in the notes.