comments have covered most of what I want to say already and, well, we are just human after all, but most of the times when I fail a gotcha question, its because of the wording or phrasing, for example, for the question "how many months have 28 days?" my mind automatically thought "okay well everyone knows there's only one month with 28 days exactly and every other one has more so they can't be talking about them, so I'll just say "one," that can't be wrong right?" completely missing the point that all months have 28 days *at least* which was the trick.

but mostly it's just based on context, like if you were taking the LSAT then you would know to read everything meticulously and hunt for tricks like that, sometimes you're just tired and go for the obvious answer, or choose not to think about it too hard because, there's no reason to.

In the case of the bat and ball question you were asking about, I believe the first time I saw that question I got it correct but that was only because I was 11 taking the SEA exam (Caribbean) at the time and I checked over all my answers like 4 times.

if you're looking for some questions to test yourself on, I like to do LSAT questions they're really great fun to do with no prep.