The reason I score low is due to problems in short term memory retention and pattern recognition. Take the next sentence for example. You might be able to skim over it in a few seconds, and skip a few words as you'd be able to key in on some words and work out the meaning of the sentence based on experience. I have a lot more difficulty; most typically I have to read everything word for word in order to grasp the meaning, in some cases up to three times before I am able to work it out. It doesn't mean that I cannot solve the same problem that someone with a 120 IQ can, it means that it takes me quite a bit more time before I'm able to keep it in my head.
And oddly it's for that reason that I'm actually decent at QA. To compensate for the memory problems, I tend to take notes. Very meticulous notes of what I'm doing, when I'm doing it, and why I'm doing it. It makes my test work slow but it makes creating bug reports easy, and the developers seem to like the the level of detail that is written in those reports.
QA work, only 40k, and super low IQ? Is this a jab at QA workers...?