The Bellhop Problem

[Abaddon_ire]

Yes, because Monty Hall is counterintuitive, no, because the bellhop problem is not. Bellhop relies on misdirection. It falsely adds the guests expenditure
($27) to the bellhops income ($2) for a total 0f $29 with one missing dollar. If that is allowed, the one could just as easily add the guests expenditure ($27) to the Hotel's income ($25) for a total of $52 which gives us $22 extra. Or one could add the guests income ($3) to the hotels income ($25) to give $28 with two dollars missing. To make it work as a problem, one must add inappropriate intermediate numbers while ignoring others.

Try this one, it seems simple at first blush
 but I have in the past seen flame wars over it.

Not familiar to me but ..

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.. the store owner is out the $100 that was stolen and that is all.  He received the full $70 value of the merchandise (the $100 tendered minus the $30 he returned in change).

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Ah, but

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the store owner paid less than $70 for the goods

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