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Palindromes and Divisibility (Posted on 2015-10-16) Difficulty: 3 of 5
How many positive palindromes less than 20150 are divisible by 7?

No Solution Yet Submitted by K Sengupta    
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Solution re: analytic solution Comment 3 of 3 |
(In reply to analytic solution by Paul)

Looks like I forgot to filter out the 6-digit numbers. Oh my.


Subtracting the 20 6-digit numbers leaves 47 such integers.

You're missing 707.

  Posted by Charlie on 2015-10-16 14:16:53
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