IQ examinations are reliable at measuring IQ but what is IQ? It is primarily a measure of grasp over first the language the test is administered in, and secondly the socioeconomic position the test taker is apart of.

Yes data suggests higher IQ scores are positively correlated with things like income, educational success and even better health and longer lives but again what is this measure "IQ" pointing to? Is it some intrinsic brain capacity of capability? Perhaps and perhaps not.

I would just close by saying that if one wants to know their IQ, I would ask why? Are you seeking a measure of your ability? Then don't bother because capability is so much more complicated than a shriveled down metric such as IQ.

All that said, interesting post.