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A square divides concatenation (Posted on 2018-09-22) Difficulty: 2 of 5
What 3-dgit number abc squared divides abcabc?

NB: italic font denotes a concatenation, as opposed to a product.

  Submitted by Ady TZIDON    
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Solution: (Hide)
143, the only 3-digit divisor of 1001

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  Subject Author Date
soln via computerSteven Lord2018-09-22 08:05:10
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