The discussion revolves around proving the non-existence of a natural number that, when the first digit is swapped with the last digit, results in a number that is five times larger than the original. The subject area pertains to number theory and properties of natural numbers.
The discussion includes attempts to clarify the phrasing of the problem and the implications of the terms used. Some participants have expressed that they have resolved their understanding, while others seek further clarification on the original question.
There appears to be some ambiguity regarding the interpretation of "5 times bigger," which may affect the approach to the problem. Additionally, the repetition of the initial question suggests a need for clearer definitions or assumptions in the problem statement.
Mark J. said:How to prove that it does not exist a natural number having the property that the permutation of the first digit with the last one produces a new number being 5 times bigger compared to the original one
Regards
Mark J. said:no problem just figured it out.
thx