This is a reference request: my apologies in advance if it's not entirely appropriate for this SE. I recently came across this little puzzle: There are 20 apples in a basket on the floor. Around the basket are 20 kids. How do you give each kid one apple such that at the end, one apple still remains in the basket?

This seems like a kind of puzzle that one won't be able to solve if one makes assumptions and is rigid in their thinking (e.g.

one might be so focused on kids and apples that they ignore the basket as an active object that can be moved around

Another example: why are 1968 dollars worth more than 1964 dollars?

Since one is so used to thinking of these as years, one doesn't even consider the possibility that these numbers may indicate the amount rather than the year

I admit I fell for the traps in both cases. So to any puzzle enthusiasts on this SE: I'd be really really grateful if you could tell me some book or website or resource, etc. that contains predominantly the same type of puzzles as the two examples I gave above. In case you're aware. (I don't know what these types of puzzles are called - but I notice they kind of rely on wordplay to make the listener make assumptions or imagine a scenario, and then the answer goes against those standard assumptions/prejudices/experience)

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    $\begingroup$ This is called lateral-thinking. $\endgroup$
    – noedne
    Apr 12 '20 at 12:31
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    $\begingroup$ I would search using several of the following terms: 'brain teasers', 'trick questions', 'lateral thinking', 'thinking outside the box' and 'story problems'. $\endgroup$ Apr 12 '20 at 12:32
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    $\begingroup$ Here's another one for you: I have two coins in my pocket. They add up to 55 cents. One of them is not a 50-cent piece. What are the two coins? $\endgroup$ Apr 12 '20 at 12:34
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    $\begingroup$ Here's a hint: it's a TRICK QUESTION, like the others you mentioned. You have to not let your brain make false assumptions. Read it and try again. $\endgroup$ Apr 12 '20 at 12:49
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    $\begingroup$ You are training your brain! You are welcome, and good luck on your search. $\endgroup$ Apr 12 '20 at 12:57

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