its not random, those are very literal and dont require any knowledge - capital of Zimbabwe is 'Z' as its capital letter of the word... another example I remember was 'what is in middle of Texas' - and answer is 'x'
The answers to each questions seems to be random, not the actual answers.
The first one was "Z", as far I remember.
It's basically try and error. You have try out and memorize the answer.