Comment by spoiler

I agree with you that IQ tests are kinda useless. Also ,I think its a misconception that IQ tests test intelligence. Taking the test depends on many external and internal factors. Mood, how rested and sated you are, how comfortable you are while taking the test. Those things in turn affect your patience and your concentration, and ability to resist environmental distractions, etc, etc.

Often times experience can affect these IQ tests. One can easily warm up to IQ tests; I know you're not supposed to be able to, but it's totally doable. Do two ones in a row, and after learning the answers to the first one, you'll do loads better on the second one (after a break, so your concentration isn't depleted if you struggle with that).