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MathNet 2026 — Part 01 Question 138

Math Olympiad Vault · MathNet 2026 — Part 01

Question 138

In 1950 A "prophet" announced that the end of the world would occur in 11.08.1999 (11 of August 1999). As nothing happened on that day, he redoed his calculations and made the following prediction: "The end of the world will occur on the next date that is written with 8 different numerals." Can you find out that date?