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by Sandor Weisz

The Riddler: Fantastic Puzzles from FiveThirtyEight

The most mind-bending puzzles on the internet appear weekly in Oliver Roeder’s “The Riddler” column. Presented by FiveThirtyEight, this first-ever collection features the column’s most popular problems, along with six never-before-published puzzles, all exploring the math implicit in everyday occurrences. The simplest require a mere flash of insight, while the toughest involve deep applications of analysis and probability theory. 


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