Long before data-driven marketing and digital analytics, Henry J. Heinz understood something timeless: people remember what feels simple, specific, and a little mysterious. When he spotted an ad boasting “21 styles” of shoes during an 1896 train ride, he wasn’t impressed by the product. He was struck by the power of a precise number. His own company already sold more than 57 products, but accuracy wasn’t the goal. Emotion was. Five was his lucky number, seven his wife’s; together they created a phrase that sounded right, looked right, and lingered in the mind: “57 Varieties.”