World!Of Numbers |
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[ August 7, 2004 ] Simplifying the steps -- or seeing them written out -- makes it too obvious what is happening. Start with 36k63 where k >= 10 let n = # of digits reverse the digits and divide by 9 then multiply by 25*10(n2) add k and multiply this result by 36 subtract 63 result is a palindrome ! | |||
A000156 Prime Curios! Prime Puzzle Wikipedia 156 Le nombre 156 |
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