Cracking the Scratch Lottery Code

Mohan Srivastava, a geological statistician from Toronto, was given a scratch-off lottery ticket as a gift and managed to crack the lottery code. In this article from Wired Magaine, what’s more remarkable, the state lotteries almost refused to listen to him:

The apparent randomness of the scratch ticket was just a facade, a mathematical lie. And this meant that the lottery system might actually be solvable, just like those mining samples. “At the time, I had no intention of cracking the tickets,” he says. He was just curious about the algorithm that produced the numbers. Walking back from the gas station with the chips and coffee he’d bought with his winnings, he turned the problem over in his mind. By the time he reached the office, he was confident that he knew how the software might work, how it could precisely control the number of winners while still appearing random. “It wasn’t that hard,” Srivastava says. “I do the same kind of math all day long.”

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