My kids all knew where they were born, but I was horrified when the older was 17 and applying for scholarships and she didn't even know our mailing address. I then asked the 16 y.o. and the 12 y.o. and they didn't know either. It's not that they were dumb kids, they just lived in an area where we get our mail at a rural route mail box and our house had a legal description not an address. They'd never had to fill out a form with their address, or anyone ask for their mailing address. Everything they did was by email.