Page 2 of 2

Re: a problem from IUMO 09

Posted: Fri Feb 24, 2012 10:45 pm
by Corei13
What's your new problem? I couldn't get it. :(

Re: a problem from IUMO 09

Posted: Fri Feb 24, 2012 11:25 pm
by Masum
See the last problem carefully. It said there are powers of $2$ with digits only $1$ and $2$. You just proved that last $n$ digits have digits $1$ and $2$ according to your claim, right?