That's the theory, but it does have something to do with how a person is raised. I am not aware of any culture free tests.
Would visual placement of blocks, and guessing what blocks are behind them, have anything to do with culture?
Visualisation. Either you have it, or you don't. Nothing racist about it, and yes, it predicts success.
How about reaction time where you put ouot two or three fingers, and the other person has to put out enough fingers to make the total count odd?
Is that culteral?
How about the test where you ask for a synonym? You do know what that means, right?