document.write( "Question 1167162: A standard checkerboard has 64 squares alternating black and red on a 8 by 8 grid. How many of the 1296 rectangles on a checkerboard contain more than one red square? \n" ); document.write( "

Algebra.Com's Answer #791760 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "ANSWER.  1296 - 64 = 1232 rectangles on a checkboards contain more than one red square.\r\n" );
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document.write( "JUSTIFICATION.  32 red squares are ONLY rectangles on a chessboard that contain only one red square.\r\n" );
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document.write( "32 black squares are ONLY rectangles on a chessboard that do not contain red squares, at all.\r\n" );
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document.write( "The rest of rectangles contain MORE than one red square.\r\n" );
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