I doubt I'd be surprised: my mother is a retired school psychologist, and her trainees used me as a guinea pig for lots of different IQ tests over the years. I've pretty much seen it all.
With respect to the content of IQ tests, I tend to avoid the term "biased", as cultural knowledge is relevant in many real-life contexts, but the best IQ tests focus on exactly the kinds of questions described in the OP: math, logic, shapes, etc.
With respect to the content of IQ tests, I tend to avoid the term "biased", as cultural knowledge is relevant in many real-life contexts, but the best IQ tests focus on exactly the kinds of questions described in the OP: math, logic, shapes, etc.