document.write( "Question 393640: On a square gameboard this is divided into n rows of n squares each, k of these squares lie along the boundary of the gameboard. Which of the following is a possible value of k?\r
\n" ); document.write( "\n" ); document.write( "A. 10 B. 25 C. 34 D. 42 E. 52 \n" ); document.write( "

Algebra.Com's Answer #279635 by robertb(5830) $\"\"$ $\"About$

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k must have the form $\"k+=+n%5E2+-+%28n-2%29%5E2+=+n%5E2+-+n%5E2+%2B+4n+-+4++=4n-4+=+4%28n-1%29\"$ . Hence k must be divisible by 4. The answer is E, because 52 is the only number divisible by 4. \n" ); document.write( "

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