Being able to measure intelligence (or the problem-solving aspect of it) quantitatively could be indispensable in fields like cognitive science or artificial intelligence. Obviously, IQ tests aren't culture neutral (questions are stated in an informal language, and often rely on prior knowledge). Ideally I am looking for these characteristics:measure problem solving abilitybe culture neutralbe of unrestricted durationRaven's Progressive Matrices look almost perfect for the job (variations can be developed for testing animals or even computer programs) but they, like EVERY intelligence test i know of, require test to last not more than a specific amount time, thus, failing to satisfy the third requirement. So I guess the question is whether such a test can be constructed at all. In other words, is there a category of problems that require some minimal intelligence level to solve them no matter how long one might try. Like the problem that could be solved in a minute by a smarter person but is impenetrable to you no matter how many years you spend thinking about it? 
Duration-independent intelligence tests
intelligence;problem solving;artificial intelligence
So I guess the question is whether such a test can be constructed at  all. In other words, is there a category of problems that require some  minimal intelligence level to solve them no matter how long one might  try. Like the problem that could be solved in a minute by a smarter  person but is impenetrable to you no matter how many years you spend  thinking about it?If that is your question, the answer is no. No problems like this are currently known to exist, and there is reason to believe that such problems will never be found.Intelligence in not like this person can do A and this person can do A and B, but rather more like this person can do X with medium reliability and this person can do X with high readability.