bonanova Posted July 25, 2014 Report Share Posted July 25, 2014 The other night I wrote down a number. I thought about ways to turn it into a palindrome. I tried adding it to the larger number I got by reversing its digits. That didn't work. But I kept on doing that step, using each time the number I got from the previous step. Whether this process will always produce a palindrome, eventually, I don't know. But for my starting number it eventually worked. Can you tell me my starting number? I can tell you that after the second step the number of digits had not increased, and that a four-digit palindrome was the first to appear, after the fourth step. Quote Link to comment Share on other sites More sharing options...
0 OmegaScales Posted July 25, 2014 Report Share Posted July 25, 2014 192->483->867->1635->6996 Quote Link to comment Share on other sites More sharing options...
0 Pickett Posted July 28, 2014 Report Share Posted July 28, 2014 This is actually a subject I find really fascinating...just don't try your method with 196, or any of the other proposed "Lychrel Numbers"...you might be there for a while. Quote Link to comment Share on other sites More sharing options...
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bonanova
The other night I wrote down a number.
I thought about ways to turn it into a palindrome.
I tried adding it to the larger number I got by reversing its digits.
That didn't work.
But I kept on doing that step, using each time the number I got from the previous step.
Whether this process will always produce a palindrome, eventually, I don't know.
But for my starting number it eventually worked.
Can you tell me my starting number?
I can tell you that after the second step the number of digits had not increased,
and that a four-digit palindrome was the first to appear, after the fourth step.
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