It really isn't that important.
When you take any kind of test, to some extent what is being tested is the similarity of your thinking to that of the person who set the test. They will base the test on what their own idea of intelligence is. That is both personal and cultural.
I took a MENSA IQ test once - and I got a good score, so this isn't sour grapes:) It was in some ways laughable. For one thing, they asked for meanings of words out of context - something that in basic teacher training you are told never to do! One was "perfect". This can be an adjective or a verb and in common usage the adj. means faultless or ideal but etymologically means "complete" from the Latin perfectare. Now I'm being so pompous here because the question was "What does this word mean?" and three of the options were a) faultless b) complete c) ideal. So you have to guess what the examiner was thinking.
A lot of the questions were similar to this, in that they had several potentially correct answers, which all could have a logical basis.
Timed 2-minute tests had the instructions on the same page as the questions, so while the invigilator was reading out the fairly unnecessary and lengthy instructions, people were working out the answers.
The final nail in the coffin of its credibility was when the invigilator announced that the next questions had no instructions, because they were aimed at those whose first language was not English. Well, very nice - until she then started reading out a sheet of instructions - in English! After that I could only see the funny side.
An IQ test is a fun way of finding out if you can do pointless little puzzles. Real life requires a much more thorough kind of understanding.