I did one of these when I was a kid and had just weeks prior to that done some similar excercises I found in a puzzle book. Once you know the tricks you can fin

I did one of these when I was a kid and had just weeks prior to that done some similar excercises I found in a puzzle book. Once you know the tricks you can finish it really fast, and since they indeed use some formula that's basically the percentage of correct answers divided by the time you took times some constant, I got a very high score that I thought was bogus. Nowadays I would compare its ability to actually measure IQ or skill with those "find the fake coin by only weighing piles of money three times" interview questions, or interviews where they ask you to implement some algorithm for a problem you will only ever encounter on HackerRank or similar sites.