# Find the mysterious function that converts an 8 digit num to a 10 digit num

by bobthebanana
Tags: converts, digit, function, mysterious
 P: 23 This isn't a homework question. You guys are smart so I was wondering if you could somehow figure out the mysterious function f based on a few examples: f(26134914) = 2085386485 f(26288902) = 2085920342 f(26289423) = 2094236422 f(26356300) = 2086136115 What is "f" doing to convert that 8 digit number to a 10 digit? I'll produce more examples if needed Thanks for the help
 PF Patron Sci Advisor Thanks Emeritus P: 38,418 Do you understand that there exist an infinite number of functions that will give those specific numbers? And no matter how many more example you give, there always exist a infinite number of functions that will give any finite set of specific values.
 HW Helper P: 3,353 If you give us k examples, we can construct a polynomial of k+1 degree (or higher), whose coefficients will be determined by a set of k+1 simultaneous linear equations which we could solve using Gaussian Elimination. Want to try it, cuz i dont :P

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