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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.

See The Solution Submitted by Ady TZIDON    
Rating: 4.5000 (2 votes)

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Solution Answer Comment 3 of 3 |
Every palindrome with an even number of digits is divisible by 11, so the only palindromic prime with an even number of digits is 11.
  Posted by Math Man on 2011-01-01 11:32:24
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