An automorphic number is a number whose square ends with the same digits as the number itself. In other words, if \( n \) is an automorphic number, then when you compute \( n^2 \), the last digits of \( n^2 \) will be the same as \( n \). For example: - The number 5 is automorphic because \( 5^2 = 25 \), and the last digit (5) matches the original number.
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