Problem 50604. Number Puzzle - 099

Inspired by the movie "1408", let's have a little bit of fun with the lucky number 13. Give an example of five (5) different four-digit numbers whose sum of the digits in its square equals to 13. For example, for a one-digit number, the square of 7 is 49; the sum of 4 and 9 is 13.
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86.21% Correct | 13.79% Incorrect
Last Solution submitted on Jan 30, 2026

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