The math Olympian Richard Rusczyk’s company, Art of Problem Solving, provides resources and camaraderie for budding math prodigies. “Honestly, we’re building stuff for the 13-year-old version of ourselves,” he said.
In the fall of 1993, Rusczyk—newly married to Vanessa—started a Ph.D. in chemical engineering at Stanford. But research still struck him as unappealing. He dropped out after eight weeks. Meanwhile, orders for the math textbook were trickling in. He drove to local schools, hawking the book and hunting for a job as a math teacher. A small private high school hired him, but it wasn’t the right fit, either: he liked teaching, but it was tough to win over the students who abhorred math.
While Patrick reviewed the next set of problems, Rusczyk sipped water from a stainless steel mug. I asked whether he had been like these kids. AoPS’s paid resources aren’t cheap. An online high-school-level course with a textbook can cost more than six hundred dollars; the elementary-school-levelrun about a hundred and twenty dollars per set, and a subscription to the accompanying online platform costs ninety-six dollars a year. For much of the past twenty years, U.S.
In mathematics, a concept known as the random walk describes a meandering path that is determined, at each step, by a random process, such as tossing a coin. Say you’re standing at a street corner on Fifth Avenue and you flip two coins. If it’s two heads, you walk one block north; if it’s one head and one tail, you walk one block east, and so on. At each intersection, you repeat the process.
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