Paying Complement
A buyer hands over only the three pennies, the set complement of the bills the seller asked for.
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2017-02-09-paying-complement/ (CC BY-NC 4.0)Transcript
Buyer: "How much for these old records? I've got with me a $5 bill, a $1 bill, and three pennies."
Seller: "Sure, $6 is fine."
Seller: "This is only $0.03! That's the exact opposite of the things I asked for."
Buyer: "Hey, I'm paying you a complement!"