I think your right, IQ tests are about pure logics, not raw intelligence.
If you were familiar with developmental toys, like this, as a toddler...
...then you are more likely to get higher IQ scores later, but it won't make you the new Albert Einstein.
As for PISA test, it's just a method for evaluating teaching methods at school.
Some Nordic countries value non-authoritarian, intuitive learning, creativity, self-fulfilment, personal growth and understanding, whilst old academic countries like France insist too much on by-the-book teaching methods, off-by-heart learning and poetry recital (a waste of time) and punishment in case of failure. Nothing good can come out of that system.
As for Eas-Asian countries, they are not good examples to follow. Their students are known for working hard from dawn to dusk with almost no free time.
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