While those CAPTCHAs present a surface narrative of you having to get the problem correct, that's not how they really work. After all, it's not like they are creating those problems by hand. They're pushing the images through computers. You don't even know that what the CAPTCHA server considers correct is even close to objectively correct.
Really it's just a hook to engage you to collect a wide variety of streams to try to detect whether or not you are a human, like reaction speeds, how the mouse moves, etc. The correctness of your selection is only one small signal, and not even necessarily a large one.
The answer is, stop overthinking it. Your overthinking it is probably sending a signal that you're not a human because it's got all your timings wrong. Do what most humans do: Halfassedly click at the problem until it seems rightish and then click "Submit". Does the sliver of tire that shows up in the bottom right tile count? The human response to that question is "Who cares you dumb computer let me through to the content already", so, to maximize how human you look to the algorithm, channel your fellow human's feelings. If you feel frustrated at the CAPTCHA problem and wiggle your mouse angrily and maybe overshoot some of the squares you mean to click, so much the better and more human looking.
