Solution to Puzzle 5

Your first instinct says,”If a dog-and-a-half eats a pound and a half in a day and a half, that means that a dog eats a pound in a day, and so a dog eats six pounds in six days, right?”

Actually, it means that a dog eats a pound in a day-and-a-half, so a dog really eats four pounds in six days.

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