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play with digit (Posted on 2013-09-10) Difficulty: 1 of 5
Let A be a 2n-digit number whose digits are all 1's and let B be a n-digit number whose digits are all 2's.Show that A-B is a perfect square.

No Solution Yet Submitted by Danish Ahmed Khan    
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  Subject Author Date
solutionDaniel2013-09-10 10:16:02
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