How to prove that it does not exist a natural number having the

[Mark J.]

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

 

[Ray Vickson]

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

Does "5 times bigger" mean that one number is 5 times the size of the other, or does it mean that one is 6 times the other (so the amount by which is is bigger is 5 times)?

RGV

 

[Mark J.]

no problem just figured it out.
thx

 

[Ray Vickson]

no problem just figured it out.
thx

So, what was the answer to the question I asked?

RGV

 

[Mark J.]

that one number is 5 times the size of the other