You could write a quiz answer bot that is well ahead of the general population without any AI, just by summarizing the first page of Google results for that question. We test humans on these subjects because the information is relevant, not because they are expected to remember and reproduce them better than an electronic database.

If the test is designed to quantify intelligence and is not present in the corpus, ChatGPT does about as good as a dog, and there is little reason to think LLMs will improve drastically here.