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Algebra

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10 Mar 2010 10:49:07 IST

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an ISI problem : consider a chess board with written numbers in sequential for till 1 to 64,.We are

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an ISI problem :consider a chess board with written numbers in sequential for till 1 to 64,.We are to select 8 numbers from it such that every row has distinct cell and so has every column. prove that the sum obtained is always 260.

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rohit dhingra

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Joined: 5 Mar 2010

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11 Mar 2010 19:42:45 IST

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u always have to choose the diagonal squares..these always add sum constant

Soumik

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Joined: 31 Jul 2008

Posts: 1265

11 Mar 2010 22:53:50 IST

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No matter in whichever pattern u choose, the nos. shall always add upto 260.

There's a wonderful proof for this. Try it else I shall post it.

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