This number added to it’s square, and the digits of that summation added together, bring it back to itself. What is it?

Math Riddle: This number added to its square, and the digits of that summation added together, bring it back to itself. What is it?

Answer: The correct answer is 3.

3 squared is 9. 3+9=12. Take the two digits of the summation and add them; 1+2=3. In short; 3-9-12-3.

This can also work with the number 0 and 9.

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