a problem from IUMO 09

For college and university level advanced Mathematics
Corei13
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Location: Chittagong

Re: a problem from IUMO 09

Unread post by Corei13 » Fri Feb 24, 2012 10:45 pm

What's your new problem? I couldn't get it. :(
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Masum
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Joined: Tue Dec 07, 2010 1:12 pm
Location: Dhaka,Bangladesh

Re: a problem from IUMO 09

Unread post by Masum » Fri Feb 24, 2012 11:25 pm

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?
One one thing is neutral in the universe, that is $0$.

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