Well there used 2 be test and might still be that are based on average.

The reason when they made this was you cannot put a real exact IQ after all to have the best result you cant only write shit on a paper. I had to go some place and see some guy about 6 times. They to see your capacity and put them to the test. If your tired 1 day and your judge by that you get a gay result that is a complete bullshit. It s more accurate to say someone is under or over the average by X then say will he 70 since the average isnt something static same for someone IQ it s something that change.

But the one most ppl pass these day is the one that became more popular replacing most of the others.