You may be brilliant or not, but you really have to train for these tests. Those facts need to be bubbled up near the top.
James read children’s books to prep. They hit all the high spots with interesting fun facts that didn’t loose his attention.
I DID study, focusing on categories which show up frequently, but I would say it really only helped me with about two questions over two full games. But those one or two questions could still be the margin between victory and defeat, so I’d still say it was worth it. But you can play well and win without studying at all, frankly.