I took the test at https://iqtestonline.io. The test contains 30 questions that must be completed within 20 minutes. It tests your numerical, logical, and spatial reasoning skills. I get the IQ score result right after completing it for free.
I used to take qualified test before and the result is quite similar to this online test. I think it's a quick and easy way if you want to get the grasp of where you rank.
I'm finding LessWrong really valuable for learning, but it's getting overwhelming because many posts lack summaries. I have around 500 unread posts in my RSS feed, and I doubt I'll read more than 1/5th of them even after summarizing. I'm considering creating software to use LLM for one-paragraph summaries. I'm also thinking of filtering my feed by tag, but it's too broad for my specific interests.