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Square Digit Sum Surmise (Posted on 20150120) 

N is a positive integer less than 2015.
Find all values of N such that:
N is equal to precisely 36 less than the square of the sum of digits of N.
***As an extra challenge, solve this puzzle without using a computer program assisted method.
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Submitted by K Sengupta

Rating: 3.0000 (1 votes)


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