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Fit the middle digit (Posted on 2020-11-12) Difficulty: 3 of 5
Determine all possible digits a for which 9...9a0...09 is a square number. (Excluding the digit a there are 101 9's and 100 0's in the number)

No Solution Yet Submitted by Danish Ahmed Khan    
Rating: 5.0000 (1 votes)

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  Subject Author Date
SolutionAnswerMath Man2020-11-15 18:53:05
Some ThoughtsOne small observationSteve Herman2020-11-12 20:41:07
Solutioncomputer solutionCharlie2020-11-12 16:11:33
SolutionJer2020-11-12 08:33:12
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