Similarly, 2025 has 15 factors, and one of them is indeed 15 – the entire list ... is a perfect square, but dig a little deeper and we see some even prettier patterns. Forty-five, the number ...
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Why 2025 is a rare ‘perfect square year’The year 2025 is a “perfect square year” because it’s the product of a number multiplied by itself – 45×45=2025, a phenomenon that hasn’t happened for decades. The last time it occurred ...
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