Best Answer bushindo, 07 February 2013 - 10:49 PM

Prove that you cannot

cover a 10 x 10 chessboard with 25 figures

Tfig.gif

(Problem from Russian Math Olympiads. 6-th grade, 1964.)

Answer

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Guest Message by DevFuse

Started by Prime, Feb 07 2013 09:03 PM

Best Answer bushindo, 07 February 2013 - 10:49 PM

Prove that you cannot

cover a 10 x 10 chessboard with 25 figures

Tfig.gif

(Problem from Russian Math Olympiads. 6-th grade, 1964.)

Answer

Spoiler for

Go to the full post
3 replies to this topic

Posted 07 February 2013 - 10:58 PM

Prove that you cannot

cover a 10 x 10 chessboard with 25 figures

Tfig.gif

(Problem from Russian Math Olympiads. 6-th grade, 1964.)

Answer

Spoiler for

Nice! I had a proof that involved reviewing different scenarios, but I'm not going to post it as it's not as elegant as this.

**Edited by k-man, 07 February 2013 - 11:04 PM.**

Posted 07 February 2013 - 11:23 PM

Answer

Spoiler for

Yes, that's the solution.

Spoiler for or you could put it like that:

I knew, this problem would not last long here.

**Edited by Prime, 07 February 2013 - 11:32 PM.**

Past prime, actually.

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