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only one (Posted on 2010-12-28) Difficulty: 1 of 5
There is only one palindromic prime with an even number of digits.

Prove it.

  Submitted by Ady TZIDON    
Rating: 4.5000 (2 votes)
Solution: (Hide)
Since each palindrome with an even number of digits is divisible by 11 - the only palindromic prime with an even number of digits is 11.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionAnswerMath Man2011-01-01 11:32:24
re: Solution (spoiler)broll2010-12-29 05:51:26
SolutionSolution (spoiler)Steve Herman2010-12-28 14:55:23
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