IQ tests measure knowledge, a very comprehensive evaluation measure various things like spatial ability. I had to take several and overall I scored pretty high but they are by no means an indication of how successful a person will be becasue so many other factors are involved. Those IQ tests are merely an indication of a person ability to take in information and process it.IQ tests taken that early aren't all that accurate. IQ tests compensate for age by making them easier since the brain isn't fully developed yet. And there a massive changes in the brain during puberty where IQ can fall or rise significantly.
Null is probably sightly above average but he's literally a loser at life. That's why he surrounds himself with other losers who clap when he gets into pointless internet slapfights with a chink tech engineer tranny or a transsexual fart porn grifter.