It helps with pattern recognition and one of the main aspect of intelligence tested on IQ tests are pattern recognition, so it might inflate the IQ scores of people with ADHD and gives the impression that they're smarter than the average person?

Also, lots of early primary school stuff can be easily deduced by pattern recognition. I coasted school until I hit high school, which I think a lot of people here can relate.

[–] [email protected] 4 points 18 hours ago

I excelled at taking tests. One of my particularly exceptional (now useless) abilities was to deduce the answer to one question based on the wording of another question.