Abundant vs. Deficient
18 is abundant (its proper divisors add up to more than 18) and feels great. 25 is deficient (its divisors add up to only 6) and feels bullied by mathematicians.
Transcript
[ABUNDANT] 18: "I feel so cheerful and alive!" (divisible by 1, 2, 3, 6, 9, which sum to 21) [DEFICIENT] 25: "I feel bullied by mathematicians." (divisible by 1, 5, which sum to 6)
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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/2022-04-05-abundant-vs-deficient/ (CC BY-NC 4.0)