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Palindromes' divisibility (Posted on 2019-02-22) Difficulty: 3 of 5
There are ni 4-digit palindromes divisible by i.

List all ni values for i =2,3,4,...10,11,12..

P&P only for solving - please.
Verification by software - ok.

See The Solution Submitted by Ady TZIDON    
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re: Mentally Comment 2 of 2 |
(In reply to Mentally by armando)

Only one error found during software verification: there are only 13 4-digit palindromes divisible by 6:


2112
2442
2772
4224
4554
4884
6006
6336
6666
6996
8118
8448
8778

  Posted by Charlie on 2019-02-26 09:38:22
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