document.write( "Question 1166110: The interiors of all the unit squares of a 10 by 10 board are to be painted. Any two squares that have a side in common will be painted with a different colour of paint. What is the least number of colours that will be needed? \n" ); document.write( "
Algebra.Com's Answer #790596 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Two.\r
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\n" ); document.write( "\n" ); document.write( "Recall a chess board.\r
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