Hey! I personally find this topic interesting as well. I guess it's a thing in occidental culture.
Though most tests that you can find googling "IQ test" are complete bullshit (here is a link to an article about it https://www.theguardian.com/science/2013/nov/29/iq-tests-online-are-they-valid), neuroscientists still use well-designed IQ-tests in their researchs. It often aim to test a specific cognitive faculty, and can be anything from multiple-choice questions to games... But those aren't tests you can find and pass from your computer (even though you can find some tests presented as games https://iq-research.info/en for exemple)