Reading that stuff always makes me feel incredibly stupid (or rather clueless). I wouldn't be able to answer most of those questions off the top of my head. Including this weird clock hand question (which is probably some trivial math that might or might not have been taught to me more than a decade ago and which I never ever actually applied since). Then I probably have to remind myself that I'm (halfway successfull…
1. Find people who fit the current culture
2. For the interviewer to feel better about already having a job at Google. I remember one guy bragging about how much he made.
It's really not to find out if you're good at something. I have been offered jobs at some of the FAANMG companies so I'm not talking out of jealousy or whatever.