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Pick a number. Reverse its digits and add the resulting number to the original number. If the result isn't a palindrome, repeat the process. Do all numbers in base 10 eventually become palindromes through this process? Nobody knows.

For example, start with 87. Applying this process, we obtain:


87 + 78 = 165
165 + 561 = 726
726 + 627 = 1353
1353 + 3531 = 4884, a palindrome

John Walker: Final Report On The Palindrome Quest.

Noch mehr Spaß mit Zahlen: 196 and Other Lychrel Numbers.

[via Schockwellenreiter, haboglabobloggin']
 
 
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