Random Walk
A spouse heading out on a 'random walk' gives answers that are technically correct: return is certain, but the expected time is infinite.
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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/2018-05-28-random-walk/ (CC BY-NC 4.0)Transcript
A: "Where are you going?" B: "A random walk."
A: "When will you be back?" B: "Finite time."
A: "Are you sure?" B: "Yes, 100% sure."
A: "How long will it take?" B: "Best guess, infinity seconds."
A: "You're infuriating."
[Caption] "The key to any marriage is good communication."