Intriguing Mathematical Problems, Dover Publications.
I like this one for its sheer density of wrongness. In less than twenty words we get three notions that would be ridiculous in a real context: That the narrator would have a favorite orange, that we have to solve a contrived word problem to find its weight, and, the punchline, once we solve it, that this “orange” weighs nine pounds.
My favorite orange weighs nine-tenths of its weight plus nine-tenths of a pound. What does it weigh?
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