perplexus.info :: Numbers : only one

only one (Posted on 2010-12-28)

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
Puzzle Thoughts	K Sengupta	2024-07-04 02:12:16
Answer	Math Man	2011-01-01 11:32:24
re: Solution (spoiler)	broll	2010-12-29 05:51:26
Solution (spoiler)	Steve Herman	2010-12-28 14:55:23

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