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Making any integer with four 2s (2025)(eli.thegreenplace.net)
The article discusses a math puzzle where the goal is to create any integer using four 2s, with increasingly complex solutions as one's math skills improve. The puzzle can be approached at various levels, from elementary school to university, and even involves advanced mathematical tools like the Gamma function, integrals, and complex numbers. However, mathematician Paul Dirac found a general solution using nested square roots, which was later modified to use exactly four 2s by replacing a single digit with an equivalent expression involving two 2s, thereby creating a formula that can generate any integer with four 2s, albeit with a potentially debated interpretation of the puzzle's rules.