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This year 2025 = 45² is not just any year; it’s a "perfect square year."
It’s the square of the sum of all the digits in the decimal system: (0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)² = 2025.
It’s also the sum of the cubes of these same digits: (0³ + 1³ + 2³ + 3³ + 4³ + 5³ + 6³ + 7³ + 8³ + 9³) = 2025.
The last perfect square year was 1936, and the next one won’t come until 2116 !
This year 2025 = 45² is not just any year; it’s a "perfect square year."
It’s the square of the sum of all the digits in the decimal system: (0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)² = 2025.
It’s also the sum of the cubes of these same digits: (0³ + 1³ + 2³ + 3³ + 4³ + 5³ + 6³ + 7³ + 8³ + 9³) = 2025.
The last perfect square year was 1936, and the next one won’t come until 2116 !