'Smarter'? Seriously, If I would do an IQ test right now, I would get a certain score. If I would now practice 5 hours on IQ-tests, then did an official one, I would score higher. Just because I master the lame questions they use on IQ-test doesn't mean I actually got a few points of IQ smarter. If you believe that, you have a bit to much faith in tests that test something (intelligence) that doesn't have a single value, yet the tests give a single-value-result.[/b]
As you're putting it you merely train your skills in solving those type of questions, which has nothing to do with intelligence, it's rather adaption, as you say.

If you practice a lot though you're training your ability to think logically. If you believe your intelligence are only genetic you should think again. It is true that you can become smarter by exercising your brain with logical challenges. I also agree that IQ-test isn't a very good way to measure intelligence. There are many different intelligences in the brain. I read a book that touched the subject, "The Speed Reading Book" by Tony Buzan and I think he said that you can "divide" the brain into eight different (I think it was eight) intelligences (language, logical, musical, artistic etc.).